GK MCQ Quiz about Science and Technology, Part-1
General Knowledge MCQ Quiz Series: Science and Technology, Part-1
Welcome to our General Knowledge Multiple Choice Quiz series focusing on Science and Technology! This series aims to test your understanding of fundamental concepts in physics, astronomy, chemistry, and related scientific disciplines.
In each quiz, you'll encounter a set of intriguing questions designed to challenge your knowledge and broaden your understanding of key scientific principles. Whether you're a student, a science enthusiast, or simply curious about the world around us, these quizzes are a fun way to explore and learn more about various aspects of science and technology.
Join us as we delve into topics like forces and energy, famous scientific theories and laws, properties of light, atmospheric phenomena, and much more. Each question is followed by a detailed explanation to help reinforce your understanding of the correct answers.
Let's dive into the fascinating world of science and technology through these engaging multiple-choice questions. Have fun exploring and expanding your scientific knowledge!
What is the SI unit of force?
A) Newton
B) Joule
C) Watt
D) Pascal
Answer:
A) Newton
Explanation:
The SI unit of force is the Newton (N). It is named after Sir Isaac Newton, who made significant contributions to the field of mechanics and formulated the laws of motion. One Newton is defined as the amount of force required to accelerate a mass of one kilogram by one meter per second squared (1 N = 1 kg m/s²). Therefore, when we talk about forces in physics, we typically use the unit Newton (N) to quantify the magnitude of the force applied to an object.
Question: 2
Who developed the theory of general relativity?
A) Isaac Newton
B) Albert Einstein
C) Stephen Hawking
D) Galileo Galilei
Answer: B) Albert Einstein
Explanation:
General relativity, developed by Albert Einstein and published in 1915, revolutionized our understanding of gravity. According to this theory, gravity is not just a force between masses but rather the result of the curvature of spacetime caused by mass and energy. Objects with mass, like planets and stars, create distortions in spacetime, which we perceive as the force of gravity. General relativity has been confirmed by various experiments and observations and remains a cornerstone of modern physics.
Question: 3
What type of energy is stored in a battery?
A) Mechanical energy
B) Thermal energy
C) Chemical energy
D) Electrical energy
Answer:
C) Chemical energy
**Explanation:**
The energy stored in a battery is chemical energy. Batteries convert chemical energy into electrical energy through a chemical reaction that occurs inside the battery cells. This chemical energy is released when the battery is connected to a circuit, allowing electrons to flow and produce electrical current. As the battery discharges, the chemical reactions within the battery cells deplete the stored chemical energy, eventually causing the battery to lose its ability to generate electrical power.
Question:4
What is the process by which heat is transferred through a material without involving any movement of the material itself?
A) Conduction
B) Convection
C) Radiation
D) Insulation
Answer:
A) Conduction
Explanation:
Conduction is the process by which heat is transferred through a material without involving any movement of the material itself. In conduction, heat energy is transferred from a region of higher temperature to a region of lower temperature by direct contact between the particles of the material. The particles with higher kinetic energy (higher temperature) transfer their energy to neighboring particles with lower kinetic energy (lower temperature), causing the heat to propagate through the material. This transfer of heat occurs primarily in solids or stationary fluids (liquids and gases) where the molecules are closely packed and can pass energy from one to another through collisions.
**Question 5:**
What is the unit of electrical resistance?
A) Ampere (A)
B) Ohm (Ω)
C) Volt (V)
D) Watt (W)
**Answer:** B) Ohm (Ω)
**Explanation:** Electrical resistance is measured in ohms (Ω), named after the German physicist Georg Simon Ohm. One ohm is the resistance that allows one ampere of current to flow when one volt of electrical potential is applied across it.
**Question 6:**
What phenomenon causes the sky to appear blue?
A) Reflection
B) Refraction
C) Rayleigh scattering
D) Dispersion
**Answer:** C) Rayleigh scattering
**Explanation:** The sky appears blue due to Rayleigh scattering, where shorter wavelengths of light (like blue) are scattered more by molecules in the atmosphere compared to longer wavelengths.
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**Question 7:**
What law states that every action has an equal and opposite reaction?
A) Newton's First Law
B) Newton's Second Law
C) Newton's Third Law
D) Boyle's Law
**Answer:** C) Newton's Third Law
**Explanation:** Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.
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**Question 8:**
What is the speed of light in a vacuum?
A) 300,000 km/s
B) 150,000 m/s
C) 3 × 10^8 m/s
D) 30,000 miles/hour
**Answer:** C) 3 × 10^8 m/s
**Explanation:** The speed of light in a vacuum is approximately 3 × 10^8 meters per second (m/s).
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**Question 9:**
What instrument is used to measure atmospheric pressure?
A) Barometer
B) Thermometer
C) Hygrometer
D) Anemometer
**Answer:** A) Barometer
**Explanation:** A barometer is used to measure atmospheric pressure, which helps in weather forecasting and studying air pressure variations.
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**Question 10:**
What is the basic unit of capacitance?
A) Ohm (Ω)
B) Farad (F)
C) Henry (H)
D) Watt (W)
**Answer:** B) Farad (F)
**Explanation:** The farad (F) is the unit of capacitance, representing one coulomb of charge per volt across a capacitor.
To be continued.
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