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Physics Quiz Questions

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32 questions · Updated September 2026

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  1. 1. Fill in the blank: Energy cannot be created or destroyed, only _____ from one form to another.

    1. destroyed
    2. transformed
    3. created
    4. lost
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    Correct answer: transformed

    Explanation: This principle is known as the law of conservation of energy, which states that energy can only change forms.

  2. 2. True or False: The speed of light is approximately 300,000 kilometers per second.

    1. False
    2. True
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    Correct answer: True

    Explanation: The speed of light in a vacuum is approximately 299,792 kilometers per second, commonly rounded to 300,000 kilometers per second.

  3. 3. What is the unit of force in the International System of Units (SI)?

    1. Pascal
    2. Watt
    3. Joule
    4. Newton
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    Correct answer: Newton

    Explanation: The Newton (N) is the SI unit of force, defined as the force required to accelerate one kilogram of mass at a rate of one meter per second squared.

  4. 4. Who is known for the theory of relativity?

    1. Galileo Galilei
    2. Isaac Newton
    3. Niels Bohr
    4. Albert Einstein
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    Correct answer: Albert Einstein

    Explanation: Albert Einstein developed the theory of relativity, which revolutionized our understanding of space, time, and gravity.

  5. 5. What is the primary form of energy stored in food?

    1. Nuclear Energy
    2. Thermal Energy
    3. Kinetic Energy
    4. Potential Energy
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    Correct answer: Potential Energy

    Explanation: Food stores energy in the form of chemical potential energy, which can be released when the body metabolizes it.

  6. 6. Fill in the blank: The basic unit of electric current is the _____.

    1. Ampere
    2. Watt
    3. Ohm
    4. Volt
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    Correct answer: Ampere

    Explanation: The ampere (A) is the SI unit of electric current, representing the flow of electric charge.

  7. 7. What is the energy associated with an object's motion called?

    1. Kinetic Energy
    2. Thermal Energy
    3. Mechanical Energy
    4. Potential Energy
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    Correct answer: Kinetic Energy

    Explanation: Kinetic energy is the energy an object possesses due to its motion, calculated as one-half the mass multiplied by the velocity squared.

  8. 8. Fill in the blank: The device that measures electric current is called an _____

    1. wattmeter
    2. voltmeter
    3. ohmmeter
    4. ammeter
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    Correct answer: ammeter

    Explanation: An ammeter is an instrument used to measure the flow of electric current in a circuit, typically expressed in amperes.

  9. 9. True or False: A conductor allows electric current to flow easily, while an insulator does not.

    1. False
    2. True
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    Correct answer: True

    Explanation: Conductors, such as metals, permit the easy flow of electric current, while insulators, like rubber, resist electron flow.

  10. 10. Fill in the blank: The process by which a liquid changes into a gas is called _____

    1. evaporation
    2. sublimation
    3. condensation
    4. precipitation
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    Correct answer: evaporation

    Explanation: Evaporation is the process in which molecules at the surface of a liquid gain enough energy to enter the gaseous phase.

  11. 11. What is the speed of light in a vacuum?

    1. 200,000,000 m/s
    2. 250,000,000 m/s
    3. 299,792,458 m/s
    4. 300,000,000 m/s
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    Correct answer: 299,792,458 m/s

    Explanation: The speed of light in a vacuum is approximately 299,792,458 meters per second.

  12. 12. In physics, which of the following phenomena is an example of Newton's first law?

    1. A ball rolling on a flat surface comes to a stop due to friction.
    2. A book resting on a table remains at rest until moved.
    3. A satellite orbits Earth due to gravitational pull.
    4. A car accelerates when the gas pedal is pressed.
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    Correct answer: A book resting on a table remains at rest until moved.

    Explanation: Newton's first law states that an object at rest will remain at rest unless acted upon by an external force. The book on the table exemplifies this principle.

  13. 13. Fill in the blank: The gravitational force between two objects depends on their masses and the _____ between them.

    1. shape
    2. distance
    3. speed
    4. volume
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    Correct answer: distance

    Explanation: Gravitational force is described by Newton's law of universal gravitation, which states that the force decreases with increasing distance between the centers of the two masses.

  14. 14. Which of the following describes the phenomenon of light bending when it passes from one medium to another?

    1. Diffraction
    2. Interference
    3. Reflection
    4. Refraction
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    Correct answer: Refraction

    Explanation: Refraction occurs when light changes speed as it moves between different media, causing it to change direction.

  15. 15. True or False: The law of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it.

    1. False
    2. True
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    Correct answer: True

    Explanation: The law of conservation of momentum indicates that the total momentum of a system does not change unless acted upon by an external force.

  16. 16. What is the primary reason for the seasons on Earth?

    1. The distance from the Sun
    2. The Sun's energy output
    3. The tilt of Earth's axis
    4. The shape of Earth's orbit
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    Correct answer: The tilt of Earth's axis

    Explanation: Seasons change due to the tilt of Earth's axis, which causes different parts of the planet to receive varying amounts of sunlight throughout the year.

  17. 17. True or False: The electromagnetic spectrum includes only visible light.

    1. True
    2. False
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    Correct answer: False

    Explanation: The electromagnetic spectrum encompasses a range of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

  18. 18. Which law states that the pressure of a given mass of gas is inversely proportional to its volume at a constant temperature?

    1. Charles's Law
    2. Avogadro's Law
    3. Dalton's Law
    4. Boyle's Law
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    Correct answer: Boyle's Law

    Explanation: Boyle's Law describes the relationship between the pressure and volume of a gas, stating that if the temperature is held constant, an increase in volume results in a decrease in pressure.

  19. 19. Which of the following statements is true regarding thermal expansion?

    1. Different materials expand at different rates.
    2. Only solids expand with heat.
    3. All materials expand equally when heated.
    4. Thermal expansion is not a significant physical phenomenon.
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    Correct answer: Different materials expand at different rates.

    Explanation: Different materials have unique coefficients of thermal expansion, which determine how much they expand with temperature changes.

  20. 20. Fill in the blank: The energy stored in a stretched spring is an example of _____ energy.

    1. thermal
    2. kinetic
    3. potential
    4. mechanical
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    Correct answer: potential

    Explanation: The energy stored in a stretched spring is a form of potential energy, specifically elastic potential energy.

  21. 21. Which of the following is a non-renewable energy source?

    1. Geothermal
    2. Solar
    3. Natural Gas
    4. Wind
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    Correct answer: Natural Gas

    Explanation: Natural gas is classified as a non-renewable energy source because it is formed from decomposed organic materials over millions of years and cannot be replenished quickly.

  22. 22. True or False: Sound travels faster in air than in water.

    1. True
    2. False
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    Correct answer: False

    Explanation: Sound travels faster in water than in air due to the greater density and elastic properties of water.

  23. 23. What is the principle that states pressure in a fluid decreases as the fluid's velocity increases?

    1. Bernoulli's Principle
    2. Boyle's Law
    3. Archimedes' Principle
    4. Pascal's Principle
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    Correct answer: Bernoulli's Principle

    Explanation: Bernoulli's Principle describes how an increase in the speed of a fluid results in a decrease in pressure within that fluid.

  24. 24. What is the term for a wave that requires a medium to travel through?

    1. Mechanical Wave
    2. Transverse Wave
    3. Longitudinal Wave
    4. Electromagnetic Wave
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    Correct answer: Mechanical Wave

    Explanation: Mechanical waves require a medium, such as air or water, to propagate, unlike electromagnetic waves that can travel through a vacuum.

  25. 25. Fill in the blank: The force of gravity depends on the mass of the objects and the ______ between them.

    1. temperature
    2. velocity
    3. mass density
    4. distance
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    Correct answer: distance

    Explanation: Gravity's strength decreases with the square of the distance between two masses, as described by Newton's law of universal gravitation.

  26. 26. True or False: Absolute zero is the lowest possible temperature, measured as 0 degrees Celsius.

    1. False
    2. True
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    Correct answer: False

    Explanation: Absolute zero is defined as 0 Kelvin, which is equivalent to -273.15 degrees Celsius, the point at which molecular motion ceases.

  27. 27. Fill in the blank: The phenomenon of light splitting into different colors is known as _____

    1. diffraction
    2. reflection
    3. dispersion
    4. refraction
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    Correct answer: dispersion

    Explanation: Dispersion occurs when light is refracted through a prism, separating it into its constituent colors.

  28. 28. Which of the following describes a transverse wave?

    1. Particles move parallel to the direction of wave travel.
    2. Particles move perpendicular to the direction of wave travel.
    3. Waves require a medium to travel.
    4. Waves can travel through a vacuum.
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    Correct answer: Particles move perpendicular to the direction of wave travel.

    Explanation: In a transverse wave, the motion of the particles is perpendicular to the direction the wave travels, as seen in waves on a string.

  29. 29. Which physicist introduced the concept of the photon?

    1. Albert Einstein
    2. Niels Bohr
    3. Max Planck
    4. Richard Feynman
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    Correct answer: Max Planck

    Explanation: Max Planck is credited with introducing the concept of the quantum of electromagnetic radiation, which he called the photon.

  30. 30. Which of the following is an example of an elastic collision?

    1. A rubber ball hitting the ground and bouncing back.
    2. A car crashing into a wall.
    3. Two billiard balls striking each other.
    4. A clay ball thrown against the floor.
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    Correct answer: Two billiard balls striking each other.

    Explanation: In an elastic collision, both momentum and kinetic energy are conserved, as seen with billiard balls that bounce off each other.

  31. 31. Which scientist is known for his contributions to quantum mechanics and the uncertainty principle?

    1. Albert Einstein
    2. Max Planck
    3. Werner Heisenberg
    4. Niels Bohr
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    Correct answer: Werner Heisenberg

    Explanation: Werner Heisenberg developed the uncertainty principle, which states that certain pairs of physical properties cannot both be known to arbitrary precision.

  32. 32. Which of the following best describes a black hole?

    1. A swirling mass of gas.
    2. A type of neutron star.
    3. A large star burning out.
    4. A region of space where gravity is so strong that nothing can escape from it.
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    Correct answer: A region of space where gravity is so strong that nothing can escape from it.

    Explanation: A black hole is formed when a massive star collapses and creates a region in space with gravitational pull so strong that nothing, not even light, can escape.

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Salim has experience in content marketing, growth marketing, product marketing, online forms, and building viral quizzes. Salim founded Quiz Questions Org (QQO, in short) in 2025. Ever curious, he loves researching different topics and areas to turn them into quizzes. Salim has a lifelong passion for cycling and traveling.