# Class 8 Physics MCQ Questions

## Top Class 8 Physics MCQ Questions with Answers

Here is the list of some more than 50 Class 8 MCQ Questions with answers. Practice these important easy to advanced class 8 MCQ Questions for your CBSE Board Exam and other competitive Exams.

Note: The Answers/Explanations are provided at the bottom of the article or questions.

1. What is the SI Unit of Pressure?

a) Pascal

b) N/m2

c) Both a and b

d) None of the above

2. What is the SI Unit of Force?

a) newton

b) kgms-2

c) dyne

d) a and b

3. Which of the following is a unit of power?

a) Ohm

b) Ampere

c) Volt

d) Watt

4. What is the name of the device used to measure wind speed?

a) Barometer

b) speedometer

c) Anemometer

d) All of the above

5. Which of the following is used to measure time?

a) second

b) week

c) month

d) All the above

6. What is the SI unit of force?

a) Newton
b) Joule
c) Kilogram
d) Watt

7. Which of the following is a unit of electric current?

a) Ohm
b) Ampere
c) Volt
d) Watt

8. What is the boiling point of water in Celsius?

a) 100 °C
b) 0 °C
c) 50 °C
d) 212 °C

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

a) 300,000 m/s
b) 150,000 m/s
c) 3,000 m/s
d) 30,000 m/s

10. Which of the following is NOT a type of simple machine?

a) Lever
b) Pulley
c) Magnet
d) Inclined plane

11. What is the formula for calculating speed?

a) Speed = Distance × Time
b) Speed = Time ÷ Distance
c) Speed = Distance ÷ Time
d) Speed = Time + Distance

12. Which of the following materials is a good conductor of electricity?

a) Plastic
b) Rubber
c) Copper
d) Glass

13. What is the SI unit of power?

a) Watt
b) Joule
c) Newton
d) Ohm

14. What happens to the speed of an object if the force acting on it increases?

a) Speed decreases
b) Speed remains constant
c) Speed increases
d) Speed becomes zero

15. Which of the following is a form of energy produced by the movement of electrons?

a) Mechanical energy
b) Thermal energy
c) Electrical energy
d) Chemical energy

16. The resistance of a conductor depends on its:

a) Length and thickness
b) Length and temperature
c) Temperature and thickness
d) Temperature and material

17. Which law of motion states, “Every action has an equal and opposite reaction”?

a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Kepler’s Law

18. What type of energy does a stretched rubber band have?

a) Kinetic energy
b) Potential energy
c) Mechanical energy
d) Thermal energy

19. What is the SI unit of electric charge?

a) Ampere
b) Volt
c) Coulomb
d) Ohm

20. When light is refracted, it:

a) Bends away from the normal
b) Bends towards the normal
c) Travels in a straight line
d) Reflects off the surface

21. What is the energy possessed by a body due to its motion called?

a) Kinetic energy
b) Potential energy
c) Electrical energy
d) Thermal energy

22. Which of the following is NOT a renewable source of energy?

a) Solar energy
b) Wind energy
c) Fossil fuels
d) Hydroelectric energy

23. Which of the following is a scalar quantity?

a) Velocity
b) Acceleration
c) Distance
d) Force

24. Which of the following is the correct formula for calculating work done?

a) Work = Force × Distance
b) Work = Force ÷ Distance
c) Work = Distance ÷ Force
d) Work = Force + Distance

25. What is the SI unit of frequency?

a) Hertz
b) Watt
c) Joule
d) Ohm

26. Which of the following is a good conductor of heat?

a) Plastic
b) Wood
c) Aluminum
d) Rubber

27. What is the unit of measurement for potential difference?

a) Volt
b) Ampere
c) Ohm
d) Joule

28. Which of the following devices converts electrical energy into mechanical energy?

a) Generator
b) Motor
c) Transformer
d) Capacitor

29. What is the force of attraction between any two objects with mass called?

a) Friction
b) Tension
c) Gravity
d) Magnetism

30. Which of the following is an example of a non-contact force?

a) Friction
b) Tension
c) Muscular Force
d) Magnetism

31. What is the acceleration due to gravity on the surface of the Earth?

a) 9.8 m/s²
b) 6.67 × 10¹¹ Nm²/kg²
c) 3.0 × 10⁸ m/s²
d) 1.0 m/s²

32. Which of the following is NOT a type of electromagnetic wave?

b) Sound waves
c) X-rays
d) Gamma rays

33. What is the process of converting a solid directly into a gas called?

a) Evaporation
b) Condensation
c) Sublimation
d) Melting

34. Which of the following statements about concave mirrors is true?

a) They always produce virtual images.
b) They always produce real images.
c) They can produce both real and virtual images.
d) They do not produce images.

35. What is the SI unit of magnetic field strength?

a) Tesla
b) Joule
c) Ohm
d) Watt

36. What is the SI unit of pressure?

a) Pascal
b) Newton
c) Joule
d) Kilogram

37. Which of the following materials is a good insulator of electricity?

a) Copper
b) Aluminum
c) Rubber
d) Silver

38. What is the force exerted by a surface perpendicular to the surface called?

a) Frictional force
b) Tension force
c) Normal force
d) Gravitational force

39. Which of the following is an example of a contact force?

a) Magnetic Force
b) Electrostatic Force
c) Tension Force
d) Gravitational Force

40. What is the process of a liquid changing into a gas at its boiling point called?

a) Melting
b) Evaporation
c) Condensation
d) Sublimation

41. Which of the following is NOT a type of simple harmonic motion?

a) Pendulum motion
b) Spring motion
c) Circular motion
d) Oscillatory motion

42. What is the measure of the amount of matter in an object called?

a) Mass
b) Weight
c) Volume
d) Density

43. Which of the following is an example of a non-inertial frame of reference?

a) A car moving at a constant speed on a straight road
b) A car accelerating on a curved road
c) A train moving at a constant speed on a straight track
d) A train decelerating on a straight track

44. What is the SI unit of magnetic flux?

a) Tesla
b) Weber
c) Henry
d) Ampere

45. Which of the following statements about convex lenses is true?

a) They always produce virtual images.
b) They always produce real images.
c) They can produce both real and virtual images.
d) They do not produce images.

46. What is the property of a body to resist any change in its state of motion called?

a) Inertia
b) Acceleration
c) Velocity
d) Force

47. Which of the following statements about series circuits is true?

a) The total resistance is equal to the sum of individual resistances.
b) The total current is equal in all branches.
c) The total voltage is equal in all branches.
d) Adding more bulbs decreases the total resistance.

48. What is the process of conversion of a gas into a liquid called?

a) Condensation
b) Evaporation
c) Sublimation
d) Melting

49. Which of the following is NOT a fundamental force in nature?

a) Gravitational force
b) Electromagnetic force
c) Strong nuclear force
d) Weak nuclear force

50. What is the term for the force exerted by a fluid on an object immersed in it?

a) Buoyant force
b) Tension force
c) Frictional force
d) Normal force

51. Which law of motion states, “An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external force”?

a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Kepler’s Law

52. Which of the following is NOT a characteristic of a wave?

a) Amplitude
b) Frequency
c) Volume
d) Wavelength

53. What is the unit of measurement for wavelength?

a) Meter
b) Hertz
c) Joule
d) Angstrom

54. Which of the following statements about the Law of Conservation of Energy is true?

a) Energy can be created but not destroyed.
b) Energy can be destroyed but not created.
c) Energy cannot be created or destroyed, only transformed from one form to another.
d) Energy remains constant regardless of any transformations.

55. What is the SI unit of work?

a) Joule
b) Watt
c) Newton
d) Ohm

Note: More Questions will be Added Soon

Here are the answers to the multiple-choice questions:

1. c) Both (a) and (b)
2. d) a and b
3. d) Watt
4. c) Anemometer
5. d) All the above
6. a) Newton
7. b) Ampere
8. a) 100°C
9. a) 300,000 m/s
10. c) Magnet
11. c) Speed = Distance ÷ Time
12. c) Copper
13. a) Watt
14. c) Speed increases
15. c) Electrical energy
16. a) Length and thickness
17. c) Newton’s Third Law
18. b) Potential energy
19. c) Coulomb
20. a) Bends away from the normal
21. a) Kinetic energy
22. c) Fossil fuels
23. c) Distance
24. a) Work = Force × Distance
25. a) Hertz
26. c) Aluminum
27. a) Volt
28. b) Motor
29. c) Gravity
30. d) Magnetism
31. a) 9.8 m/s2
32. b) Sound waves
33. c) Sublimation
34. c) They can produce both real and virtual images.
35. a) Tesla
36. a) Pascal
37. c) Rubber
38. c) Normal force
39. c) Tension force
40. b) Evaporation
41. c) Circular motion
42. a) Mass
43. b) A car accelerating on a curved road
44. b) Weber
45. c) They can produce both real and virtual images.
46. a) Inertia
47. a) The total resistance is equal to the sum of individual resistances.
48. a) Condensation
49. d) Weak nuclear force
50. a) Buoyant force
51. a) Newton’s First Law
52. c) Volume
53. a) Meter
54. c) Energy cannot be created or destroyed, only transformed from one form to another.
55. a) Joule