Posts in category: GK Questions

100 Most Important GK Questions with Answers

Prepare for SSC, UPSC, Banking & other exams with 100 important GK questions and answers. Covers Static GK, History, Geography, Science & Current Affairs.

Basic GK Questions

1. How many days are there in a week?
   → 7 days
2. How many colors are there in a rainbow?
   → 7 colors
3. What is the capital of India?
   → New Delhi
4. How many hours are there in a day?
   → 24 hours
5. Which animal is known as the ‘King of the Jungle’?
   → Lion
6. How many continents are there in the world?
   → 7 continents
7. Which is the largest animal on Earth?
   → Blue Whale
8. What is the name of our planet?
   → Earth
9. How many letters are there in the English alphabet?
   → 26 letters
10. Which festival is known as the Festival of Lights?
    → Diwali
11. Which fruit is known as the ‘King of Fruits’?
    → Mango
12. What is the national bird of India?
    → Peacock
13. Which is the fastest land animal?
    → Cheetah
14. Which planet is closest to the Sun?
    → Mercury
15. What do bees make?
    → Honey
16. Which shape has three sides?
    → Triangle
17. Which animal gives us milk?
    → Cow
18. Which organ helps us see?
    → Eyes
19. What is the name of the festival celebrated on 25th December?
    → Christmas
20. Which gas do humans breathe in?
    → Oxygen

Static GK Questions

1. What is the national animal of India?
Bengal Tiger

2. What is the currency of Japan?
Yen

3. Who is known as the Father of the Nation in India?
Mahatma Gandhi

4. When is Independence Day celebrated in India?
15th August

5. What is the capital of Australia?
Canberra

6. Which is the national sport of India?
Hockey (unofficially)

7. What is the national flower of India?
Lotus

8. Who wrote the Indian National Anthem?
Rabindranath Tagore

9. What is the national bird of India?
Peacock

10. What is the official language of India?
Hindi

11. Who was the first President of India?
Dr. Rajendra Prasad

12. What is the national fruit of India?
Mango

13. Which is the largest state of India by area?
Rajasthan

14. Which is the smallest state of India?
Goa

15. What is the name of the Indian national currency?
Indian Rupee

16. Which Indian city is known as the Pink City?
Jaipur

17. What is India’s national tree?
Banyan Tree

18. What is the motto of India?
“Satyameva Jayate”

19. Who is the current President of India (2025)?
Droupadi Murmu

20. What is the national river of India?
Ganga

21. Which day is celebrated as Republic Day?
26th January

22. What is the highest civilian award in India?
Bharat Ratna

23. Which Indian monument is a UNESCO World Heritage Site and located in Agra?
Taj Mahal

24. Which Indian city is known as the City of Lakes?
Udaipur

25. Who is known as the Missile Man of India?
Dr. A.P.J. Abdul Kalam

Indian History & Freedom Struggle

26. Who was the first Mughal Emperor of India?
Babur

27. In which year did the Jallianwala Bagh massacre happen?
1919

28. Who founded the Maurya Empire?
Chandragupta Maurya

29. Who gave the slogan “Do or Die”?
Mahatma Gandhi

30. When did the Revolt of 1857 take place?
1857

31. Who wrote the book Discovery of India?
Jawaharlal Nehru

32. Which leader is known as the Iron Man of India?
Sardar Vallabhbhai Patel

33. Who was the first woman ruler of India?
Razia Sultana

34. Who was the founder of the Sikh religion?
Guru Nanak Dev Ji

35. Who was the last Viceroy of British India?
Lord Mountbatten

36. Which Indian leader led the Salt March?
Mahatma Gandhi

37. Who composed ‘Vande Mataram’?
Bankim Chandra Chatterjee

38. In which year was the Indian National Congress formed?
1885

39. Who was the first Governor-General of independent India?
Lord Mountbatten

40. What was the real name of Bhagat Singh?
Bhagat Singh

41. Who was the first female Governor of an Indian state?
Sarojini Naidu

42. Which movement is also known as the August Movement?
Quit India Movement

43. When was the Constitution of India adopted?
26th November 1949

44. Who was the first Prime Minister of India?
Jawaharlal Nehru

45. In which year was the Partition of Bengal?
1905

46. What was the capital of British India before Delhi?
Kolkata

47. Who was called the “Grand Old Man of India”?
Dadabhai Naoroji

48. Which freedom fighter is also known as Netaji?
Subhas Chandra Bose

49. Who gave the slogan “Swaraj is my birthright”?
Bal Gangadhar Tilak

50. What was the name of the fort where Rani Laxmi Bai died?
Gwalior Fort

Geography & Environment

51. Which is the largest continent?
Asia

52. Which river is the longest in the world?
Nile

53. Which country has the highest population?
China

54. Where is Mount Everest located?
Nepal

55. Which is the smallest country in the world?
Vatican City

56. Which is the largest desert in the world?
Sahara

57. What is the name of Earth’s largest ocean?
Pacific Ocean

58. Which Indian river is known as ‘Dakshin Ganga’?
Godavari

59. Which Indian state has the longest coastline?
Gujarat

60. Where is the Siachen Glacier located?
Ladakh (Jammu & Kashmir region)

61. Which Indian state receives the highest rainfall?
Meghalaya

62. Which is the hottest place in India?
Phalodi, Rajasthan

63. Tropic of Cancer passes through how many Indian states?
8 states

64. Which mountain range separates India from Tibet?
Himalayas

65. Which country shares the longest border with India?
Bangladesh

66. Which river is called the Sorrow of Bihar?
Kosi River

67. Which river originates from Amarkantak Plateau?
Narmada

68. Which is the cleanest city in India?
Indore

69. Which dam is built on river Sutlej?
Bhakra Nangal Dam

70. Where is the Thar Desert located?
Rajasthan

71. What is the time difference between IST and GMT?
+5:30 hours

72. What is the capital of Sri Lanka?
Sri Jayawardenepura Kotte

73. Which Indian city is known as the Silicon Valley of India?
Bengaluru

74. Which is the longest highway in India?
NH-44

75. Which Indian lake is the largest in area?
Vembanad Lake

Science, Technology & Current Affairs

76. What is the chemical symbol of water?
H₂O

77. Who invented the light bulb?
Thomas Edison

78. What is the speed of light?
3 × 10⁸ m/s

79. Who discovered gravity?
Isaac Newton

80. Which vitamin is known as the sunshine vitamin?
Vitamin D

81. What is the powerhouse of the cell?
Mitochondria

82. Which gas is essential for breathing?
Oxygen

83. Which planet is known as the Red Planet?
Mars

84. What is the boiling point of water in Celsius?
100°C

85. Which part of the brain controls heartbeat and breathing?
Medulla Oblongata

86. Who invented the computer?
Charles Babbage

87. What is the unit of electric current?
Ampere

88. What does CPU stand for?
Central Processing Unit

89. Who was the first Indian in space?
Rakesh Sharma

90. Which country launched Chandrayaan-3?
India

91. What is the full form of DNA?
Deoxyribonucleic Acid

92. Which organization conducts ISRO launches?
Indian Space Research Organisation (ISRO)

93. What is the main gas in Earth’s atmosphere?
Nitrogen

94. Which country recently joined BRICS in 2024?
Egypt (example; verify as per current updates)

95. Who is the current Prime Minister of India (2025)?
Narendra Modi

96. What is the full form of COVID-19?
Coronavirus Disease 2019

97. What is the name of India’s digital currency?
e-Rupee

98. What is the full form of AI?
Artificial Intelligence

99. Who is the current CEO of Google (2025)?
Sundar Pichai

100. Which tech company developed ChatGPT?
OpenAI

100 G.K Questions Answers

General Knowledge Questions

What is the capital of India?

The capital of India is New Delhi, a city known for its historical significance, vibrant culture, and political importance as the seat of the Indian government, including the Parliament and the residence of the President.

Who is known as the Father of the Indian Constitution?

Dr. B.R. Ambedkar is widely regarded as the Father of the Indian Constitution for his pivotal role in drafting and shaping the Constitution of India, which was adopted on January 26, 1950.

Which river is known as the “Ganga of the South”?

The Godavari River is often referred to as the “Ganga of the South” due to its immense cultural, economic, and spiritual significance in South India, particularly in the states of Andhra Pradesh and Telangana.

Which Indian state is known as the “Land of Five Rivers”?

Punjab, located in the northern part of India, is famously known as the “Land of Five Rivers” due to the five major rivers that flow through its territory, namely the Beas, Chenab, Ravi, Sutlej, and Jhelum.

Who was the first Prime Minister of India?

Jawaharlal Nehru, a prominent leader of the Indian independence movement and a close associate of Mahatma Gandhi, served as the first Prime Minister of India from 1947 to 1964, playing a crucial role in shaping the nation’s early years.

Which Indian state is known as the “Spice Garden of India”?

Kerala, situated on the southwestern coast of India, is often referred to as the “Spice Garden of India” due to its rich biodiversity, tropical climate, and extensive cultivation of spices such as black pepper, cardamom, cinnamon, and cloves.

What is the national animal of India?

The Bengal Tiger holds the prestigious title of being the national animal of India, symbolizing strength, grace, and resilience, and is an integral part of India’s cultural and ecological heritage.

Who wrote the Indian national anthem, “Jana Gana Mana”?

The Indian national anthem, “Jana Gana Mana,” was composed by the Nobel laureate Rabindranath Tagore, a revered poet, philosopher, and cultural icon of India, in the year 1911.

Which Indian state is known as the “Land of White Orchids”?

Arunachal Pradesh, located in the northeastern part of India, is often referred to as the “Land of White Orchids” due to its breathtaking natural beauty, diverse flora and fauna, and abundant orchid species found in its pristine forests.

Who was the first woman Prime Minister of India?

Indira Gandhi, the daughter of Jawaharlal Nehru, created history by becoming the first woman Prime Minister of India, serving in this role from 1966 to 1977 and again from 1980 until her assassination in 1984.

Which city is known as the “City of Joy” in India?

Kolkata, formerly known as Calcutta, holds the endearing title of the “City of Joy” due to its rich cultural heritage, literary traditions, artistic vibrancy, and the resilient spirit of its people despite facing various challenges.

What is the national flower of India?

The Lotus, revered for its symbolic significance in various Indian religions and cultures, is designated as the national flower of India, representing purity, beauty, prosperity, and the essence of Indian ethos.

Which Indian state is known as the “Land of Festivals”?

Rajasthan, the largest state in India by area, is fondly known as the “Land of Festivals” due to its colorful and vibrant cultural tapestry, where festivals and celebrations play a pivotal role in bringing communities together and showcasing the state’s rich heritage.

Who is known as the “Father of the Indian Nation”?

Mahatma Gandhi, revered as the “Father of the Indian Nation” or “Bapu,” was the preeminent leader of the Indian independence movement, advocating for nonviolent resistance and civil disobedience against British colonial rule, ultimately leading India to independence in 1947.

Which Indian city is known as the “Silicon Valley of India”?

Bengaluru, the capital city of the southern Indian state of Karnataka, holds the esteemed title of the “Silicon Valley of India” due to its prominent position as a major hub for information technology companies, startups, and technological innovation.

What is the national bird of India?

The Indian Peacock, renowned for its vibrant plumage and majestic appearance, is designated as the national bird of India, symbolizing grace, beauty, and cultural significance across various Indian traditions and folklore.

Which Indian state is known as the “Land of the Gods”?

Uttarakhand, nestled in the majestic Himalayas, is often referred to as the “Land of the Gods” due to its spiritual significance, ancient temples, sacred pilgrimage sites, and breathtaking natural landscapes, attracting devotees and tourists from around the world.

Who composed the music for the Indian national anthem, “Jana Gana Mana”?

While Rabindranath Tagore composed the lyrics of the Indian national anthem, the music was also composed by him. Tagore’s composition of “Jana Gana Mana” embodies the essence of India’s diversity, unity, and cultural heritage.

Which Indian river is considered the holiest according to Hindu mythology?

The Ganges (Ganga) River, revered as the holiest river in Hindu mythology, is considered sacred and purifying, with millions of devotees bathing in its waters to cleanse themselves of sins and attain spiritual salvation.

What is the national sport of India?

Field Hockey holds the prestigious title of being the national sport of India, with a rich legacy and illustrious history, including multiple Olympic gold medals, making it an integral part of India’s sporting heritage and identity.

Current Affairs Questions

1. Which country recently launched the Tianzhou-2 cargo spacecraft to dock with its space station core module?
   • China successfully launched the Tianzhou-2 cargo spacecraft to dock with its space station core module, marking a significant milestone in its space exploration endeavors.
2. Who won the 2021 Nobel Peace Prize?
   • The 2021 Nobel Peace Prize was awarded jointly to Maria Ressa and Dmitry Muratov for their courageous efforts to safeguard freedom of expression and promote independent journalism, particularly in challenging environments.
3. Which country recently experienced a volcanic eruption that led to the evacuation of thousands of people?
   • Tonga, a small island nation in the South Pacific, recently experienced a volcanic eruption that triggered tsunami warnings and prompted the evacuation of thousands of people from coastal areas.
4. Which city hosted the 2020 Summer Olympics?
   • Tokyo, the capital city of Japan, hosted the 2020 Summer Olympics, which were postponed to 2021 due to the COVID-19 pandemic. The event showcased resilience and adaptability amid unprecedented challenges.
5. Which cryptocurrency became the first to reach a market capitalization of $1 trillion?
   • Bitcoin, the pioneering cryptocurrency, achieved a historic milestone by becoming the first digital asset to reach a market capitalization of $1 trillion, underscoring its growing prominence in the financial world.
6. Who won the 2021 Wimbledon Men’s Singles title?
   • Novak Djokovic, the world-renowned tennis player from Serbia, clinched the 2021 Wimbledon Men’s Singles title, adding another triumph to his illustrious career record.
7. Which country recently became the first in the world to approve a COVID-19 vaccine for children under 12?
   • China emerged as the first country globally to approve a COVID-19 vaccine for children under 12, signaling a significant step in the ongoing efforts to combat the pandemic and protect vulnerable populations.
8. Which global summit aimed at addressing climate change was held in November 2021?
   • The United Nations Climate Change Conference, known as COP26, took place in Glasgow, Scotland, in November 2021, bringing together world leaders, policymakers, and activists to address the urgent challenges posed by climate change.
9. Which tech company surpassed a market capitalization of $3 trillion in late 2021?
   • Apple Inc., the multinational technology company, achieved a remarkable milestone by surpassing a market capitalization of $3 trillion, solidifying its position as one of the most valuable companies in the world.
10. Who became the first female Prime Minister of Sweden in November 2021?
    • Magdalena Andersson made history by becoming the first female Prime Minister of Sweden in November 2021, leading the country’s government and breaking gender barriers in political leadership.
11. Which country recently faced widespread protests against the government’s handling of the COVID-19 pandemic and vaccine mandates?
    • Australia witnessed widespread protests against the government’s COVID-19 pandemic response and vaccine mandates, reflecting public discontent and debate over health policies and individual freedoms.
12. Which space tourism company successfully completed its first fully crewed suborbital flight in July 2021?
    • Blue Origin, the aerospace manufacturer and spaceflight services company founded by Jeff Bezos, achieved a significant milestone by completing its first fully crewed suborbital flight, demonstrating progress in the emerging space tourism industry.
13. Who won the 2021 UEFA European Championship (Euro 2020) in football?
    • Italy emerged victorious in the 2021 UEFA European Championship, commonly known as Euro 2020, by defeating England in a thrilling final match, capturing the hearts of football fans worldwide.
14. Which country recently became the first to make Bitcoin legal tender?
    • El Salvador made history by becoming the first country to adopt Bitcoin as legal tender, paving the way for greater cryptocurrency adoption and financial innovation in the Central American nation.
15. Who won the 2021 Nobel Prize in Literature?
    • Abdulrazak Gurnah was awarded the 2021 Nobel Prize in Literature for his compelling and uncompromising narrative work that moves freely between cultures and forms, showcasing his literary prowess and cultural insights.
16. Which social media platform faced scrutiny and criticism for its role in spreading misinformation during the COVID-19 pandemic?
    • Facebook, now known as Meta Platforms, Inc., faced scrutiny and criticism for its role in spreading misinformation and conspiracy theories during the COVID-19 pandemic, leading to calls for greater regulation and accountability.
17. Which country recently launched the world’s largest carbon trading market?
    • China launched the world’s largest carbon trading market as part of its efforts to combat climate change and reduce greenhouse gas emissions, signaling a significant commitment to environmental sustainability.
18. Who won the 2021 Nobel Prize in Physiology or Medicine for their discoveries of receptors for temperature and touch?
    • David Julius and Ardem Patapoutian were jointly awarded the 2021 Nobel Prize in Physiology or Medicine for their groundbreaking discoveries of receptors for temperature and touch, advancing our understanding of sensory perception and potential medical treatments.
19. Which Indian state recently announced plans to become carbon neutral by 2050?
    • Karnataka, a state in southern India, announced ambitious plans to become carbon neutral by 2050, demonstrating its commitment to environmental conservation and sustainable development.
20. Which country recently announced plans to phase out all coal-fired power plants by 2040?
    • Germany announced plans to phase out all coal-fired power plants by 2040, aiming to accelerate its transition to renewable energy sources and reduce carbon emissions in line with its climate goals.

General Awareness Questions

1. What is the capital of Australia?
   • Canberra serves as the capital of Australia, chosen for its strategic location between Sydney and Melbourne, and it houses the nation’s governmental institutions, including the Parliament House.
2. Who is the current President of the United States?
   • As of my last update in January 2022, Joe Biden holds the office of the President of the United States, having been inaugurated on January 20, 2021.
3. What is the currency of Japan?
   • The currency of Japan is the Japanese yen, symbolized by ¥, and it is widely used in Japan for financial transactions and trade.
4. Who painted the famous artwork “The Starry Night”?
   • “The Starry Night” is a renowned masterpiece created by the Dutch artist Vincent van Gogh, known for its swirling and vivid depiction of the night sky.
5. Which planet is known as the “Red Planet”?
   • Mars, the fourth planet from the Sun, is often referred to as the “Red Planet” due to its reddish appearance caused by iron oxide prevalent on its surface.
6. What is the chemical symbol for water?
   • The chemical symbol for water is H2O, representing its composition of two hydrogen atoms bonded to one oxygen atom, essential for life on Earth.
7. Who wrote the play “Romeo and Juliet”?
   • “Romeo and Juliet” is a timeless tragedy penned by the renowned English playwright William Shakespeare, depicting the ill-fated love story of the titular characters.
8. What is the currency of Russia?
   • The currency of Russia is the Russian Ruble, denoted by the symbol ₽, and it is used as the official monetary unit in Russia and some other countries of the former Soviet Union.
9. Who is the author of the Harry Potter series?
   • The Harry Potter series was written by the British author J.K. Rowling, captivating millions of readers worldwide with its magical adventures and compelling characters.
10. What is the tallest mountain in the world?
    • Mount Everest, located in the Himalayas on the border between Nepal and China, holds the title of the tallest mountain in the world, with its peak reaching an elevation of 8,848.86 meters (29,031.7 feet) above sea level.
11. Which country is famous for the ancient monument Stonehenge?
    • Stonehenge, an iconic prehistoric monument consisting of standing stones, is located in the United Kingdom, specifically in the county of Wiltshire, England, attracting visitors from around the world with its mysterious origins and historical significance.
12. Who discovered the theory of relativity?
    • The theory of relativity was developed by the renowned physicist Albert Einstein, revolutionizing our understanding of space, time, and gravity with his groundbreaking insights.
13. What is the chemical symbol for gold?
    • Gold, a precious metal highly valued for its rarity and beauty, is represented by the chemical symbol Au, derived from the Latin word “aurum.”
14. Who wrote the novel “Pride and Prejudice”?
    • “Pride and Prejudice,” a beloved novel exploring themes of love, class, and societal expectations, was authored by the celebrated English novelist Jane Austen.
15. What is the largest ocean on Earth?
    • The Pacific Ocean holds the distinction of being the largest ocean on Earth, covering more than 30% of the planet’s surface and spanning vast expanses between Asia and the Americas.
16. Who is known as the “Father of the Nation” in India?
    • Mahatma Gandhi, revered as the “Father of the Nation” in India, played a pivotal role in leading the country’s nonviolent struggle for independence from British colonial rule, inspiring millions with his principles of truth, nonviolence, and civil disobedience.
17. What is the chemical symbol for iron?
    • Iron, a fundamental element with various industrial and biological applications, is represented by the chemical symbol Fe, derived from the Latin word “ferrum.”
18. Who was the first person to step on the moon?
    • Neil Armstrong, an American astronaut, made history on July 20, 1969, by becoming the first human to set foot on the moon during NASA’s Apollo 11 mission, uttering the famous words, “That’s one small step for man, one giant leap for mankind.”
19. What is the capital of France?
    • The capital of France is Paris, renowned for its iconic landmarks, rich cultural heritage, and status as a global center for art, fashion, and gastronomy.
20. Who painted the famous artwork “Mona Lisa”?
    • “Mona Lisa,” one of the most recognizable and celebrated artworks in the world, was painted by the Italian Renaissance artist Leonardo da Vinci, captivating viewers with its enigmatic smile and masterful technique.

General Science Questions

1. What is the chemical symbol for water?
   • Water is represented by the chemical formula H2O, indicating its composition of two hydrogen atoms bonded to one oxygen atom. This arrangement is fundamental to the unique properties and essential role of water in sustaining life on Earth.
2. What is the force that pulls objects towards the center of the Earth?
   • Gravity is the force responsible for pulling objects towards the center of the Earth. It is a fundamental force of nature that governs the motion of celestial bodies, the formation of galaxies, and the behavior of matter on both macroscopic and microscopic scales.
3. What is the hardest naturally occurring substance on Earth?
   • Diamond is the hardest naturally occurring substance on Earth, characterized by its exceptional hardness, brilliance, and resistance to scratching. Its unique molecular structure, composed of carbon atoms arranged in a crystal lattice, accounts for its extraordinary physical properties.
4. What is the smallest unit of matter?
   • The smallest unit of matter is the atom, which consists of a nucleus containing protons and neutrons, surrounded by a cloud of electrons. Atoms are the building blocks of all chemical elements and combine to form molecules, compounds, and ultimately, all matter in the universe.
5. What is the process by which plants make their own food?
   • Photosynthesis is the process by which plants, algae, and certain bacteria convert light energy from the sun into chemical energy stored in glucose and other organic compounds. This vital process not only produces oxygen as a byproduct but also serves as the foundation of the Earth’s ecosystems and food chains.
6. What is the study of the Earth’s atmosphere and weather?
   • Meteorology is the scientific study of the Earth’s atmosphere, weather phenomena, and climate patterns. Meteorologists analyze atmospheric conditions, study weather patterns and climate trends, and develop models to forecast future weather events and their potential impacts.
7. What is the chemical symbol for oxygen?
   • Oxygen, a vital element for life, is represented by the chemical symbol O2, denoting its diatomic molecular structure consisting of two oxygen atoms bonded together. Oxygen plays a crucial role in respiration, combustion, and numerous chemical processes essential for sustaining life on Earth.
8. What type of energy is stored in food?
   • Chemical energy is stored in food molecules, such as carbohydrates, fats, and proteins, through the bonds between atoms. When these bonds are broken through digestion and metabolism, the stored chemical energy is released and converted into other forms of energy that the body can use for various physiological functions.
9. What is the process by which water vapor turns into liquid water?
   • Condensation is the process by which water vapor in the atmosphere cools and transitions into liquid water droplets, forming clouds, fog, or dew. This phase transition is crucial for the water cycle, as it leads to the formation of precipitation and the replenishment of freshwater sources on Earth.
10. What is the outermost layer of the Earth’s atmosphere called?
    • The outermost layer of the Earth’s atmosphere is called the exosphere. It extends from the top of the thermosphere to the edge of space and is characterized by extremely low densities of gas molecules, gradually transitioning into the vacuum of outer space.
11. What is the force that opposes motion when two surfaces rub against each other?
    • Friction is the force that opposes motion when two surfaces come into contact and slide or rub against each other. It arises due to microscopic irregularities on the surfaces and converts kinetic energy into heat, affecting the efficiency of mechanical systems and influencing various natural phenomena.
12. What is the center of an atom called, which contains protons and neutrons?
    • The center of an atom is called the nucleus, which contains positively charged protons and electrically neutral neutrons, densely packed together. The nucleus accounts for most of the atom’s mass and is surrounded by a cloud of negatively charged electrons in orbitals.
13. What is the process by which a liquid turns into a gas?
    • Evaporation is the process by which a liquid substance transitions into a gaseous state, typically occurring at the surface of the liquid due to the escape of molecules with sufficient kinetic energy. Evaporation plays a crucial role in the water cycle, contributing to the formation of clouds and the regulation of Earth’s climate.
14. What is the unit of measurement for electrical resistance?
    • The unit of measurement for electrical resistance is the ohm (Ω), named after the German physicist Georg Simon Ohm. It represents the amount of resistance encountered by an electrical current when passing through a material and is a fundamental parameter in electrical circuit analysis.
15. What type of energy is produced by the movement of electrons?
    • Electrical energy is produced by the movement of electrons, either through the flow of electric current in conductors or the accumulation of charge in capacitors. This form of energy powers a wide range of devices and systems, driving technological advancements and supporting various aspects of modern life.
16. What is the SI unit of force?
    • The SI unit of force is the newton (N), named after the English mathematician and physicist Sir Isaac Newton. One newton is defined as the force required to accelerate a mass of one kilogram by one meter per second squared.
17. What is the study of the behavior and properties of light?
    • Optics is the scientific study of the behavior and properties of light, including its interaction with matter, propagation through different media, and formation of optical phenomena such as reflection, refraction, and diffraction. Optics encompasses various subfields, including geometric optics, physical optics, and quantum optics, with applications ranging from vision science to telecommunications.
18. What is the chemical symbol for sodium?
    • Sodium, a reactive metal belonging to the alkali metal group, is represented by the chemical symbol Na, derived from its Latin name “natrium.” It is a highly abundant element in nature and plays essential roles in biological processes, such as nerve impulse transmission and fluid balance regulation.
19. What is the force that causes objects to float in liquids or gases?
    • Buoyancy is the force that causes objects to float when immersed in liquids or gases, counteracting the force of gravity. It is exerted by the surrounding fluid and is proportional to the displaced volume of the fluid, as described by Archimedes’ principle.
20. What is the main gas that makes up the Earth’s atmosphere?
    • Nitrogen is the main gas that makes up the Earth’s atmosphere, comprising approximately 78% of the total volume of air. It plays a vital role in sustaining life, serving as an essential component of proteins, nucleic acids, and other biological molecules, and is involved in various chemical processes and environmental cycles.