Physics Gk Questions & Answers: Gk Quiz Questions on Physics

Provided below is the set of GK questions and answers on Physics. This set of Physics GK questions and answers is prepared based on ongoing exam pattern of various competitive examinations and for sure will help you score outstanding in the exam.

General Science- Physics Gk Questions & Answers

GK questions on Physics is updated below-

1. For how long approximately an image persists on the retina before vanishing?

(A) 1/8 seconds

(B) 1/16 seconds

(C) 1/32 seconds

(D) 1 second

Answer: B

2. In which of the following cases a concave mirror will form a virtual and erect image?

(A) when object is placed at infinity

(B) when object is at focus

(C) when object is between pole and focus

(D) None of the above

Answer: C

3. What is the Meissner effect?

(A) perfect paramagnetism in superconductors

(B) perfect ferromagnetism in superconductors

(C) perfect diamagnetism in insulators

(D) perfect diamagnetism in superconductors

Answer: D

4. What is the source of energy in nuclear reactors which produce electricity?

(A) Nuclear Fission

(B) Nuclear Fusion

(C) Gamma decay

(D) None of the above

Answer: A

5. What is the fuel in the Sun?

(A) Helium

(B) Hydrogen

(C) Oxygen

(D) Carbon dioxide

Answer: B

6. Which of the following are the areas of application of Doppler’s effect?

(A) At airports to guide aircraft

(B) in the military to detect enemy aircraft

(C) Sonography

(D) All of the above

Answer: D

7. What part of the electromagnetic spectrum is detected by the human eye?

(A) Between 400 nm and 700 nm

(B) Between 40 nm and 70 nm

(C) Between 400 nm and 7000 nm

(D) Between 4 nm and 700 nm

Answer: A

8. What is the temperature range used in the definition of a calorie?

(A) 12.5° C to 13.5° C

(B) 13.5° C to 14.5° C

(C) 14.5° C to 15.5° C

(D) 15.5° C to 16.5° C

Answer: C

9. What do we call the phenomenon of light being deflected when traveling obliquely from one medium to another?

(A) Refraction

(B) Reflection

(C) Dispersion

(D) Convergence

Answer: A

10. What is the minimum number of logic gates in a VLSI?

(A) 10

(B) 100

(C) 1000

(D) 10000

Answer: C

11. Which of the following are the cases of use of concave mirrors?

(A) Search-lights

(B) Shaving mirrors

(C) Solar furnaces

(D) All of the above

Answer: D

12. What is the nature of image formed by a convex mirror when the object is placed at infinity?

(A) Real and inverted

(B) Virtual and erect

(C) Virtual and inverted

(D) Real and erect

Answer: B

13. Which of these rays have the highest ionising power?

(A) Alpha

(B) Beta

(C) Gamma

(D) All have the same

Answer: A

14. Which of the following metal foils was used in the Rutherford’s alpha particle scattering experiment?

(A) Copper

(B) Silver

(C) Gold

(D) Aluminium

Answer: C

15. What causes the twinkling of stars?

(A) Atmospheric refraction of starlight

(B) Dispersion of starlight

(C) Scattering of starlight

(D) None

Answer: A

16. What of the following represents linear magnification?

(A) ratio of the height of the image to the height of the object

(B) ratio of the height of the object to the height of the image

(C) product of the height of the object to the height of the image

(D) difference of the height of the image to the height of the object

Answer: A

17. Which of these devices is used to increase the power of a signal?

(A) Amplifier

(B) Voltage regulator

(C) Attenuator

(D) All of the above

Answer: A

18. Which of these dopants is NOT used to increase the conductivity of a semi-conductor?

(A) Indium

(B) Aluminium

(C) Arsenic

(D) Boron

Answer: B

19. The spray bottles used as window or household cleaner or perfume spray works on:

(A) Capillary action

(B) Bernoulli’s Principle

(C) Pascal’s Law

(D) Stoke’s Law

Answer: B

20. Consider the following physical quantities:

1. Speed
2. Velocity
3. Amplitude
4. Acceleration

21. Which of the above remain unchanged during Uniform Circular Motion?

(A) Only 1 & 2

(B) Only 2 & 3

(C) Only 1 & 3

(D) Only 2 & 4

Answer: C

21. Which of these is used as a material for making semiconductor devices?

(A) Silicon

(B) Germanium

(C) Gallium Arsenide

(D) All of the above

Answer: D

22. Which of these means opposite phase of particles?

(A) phase difference between the particle is an odd multiple of π

(B) if the path difference is an odd multiple of (λ / 2)

(C) if the time interval is an odd multiple of T/2

(D) All of the above

Answer: D

Check- GK Questions on Chemistry

23. Which of the following law states that if two systems are in thermal equilibrium with a third system separately, then they are in thermal equilibrium with each other?

(A) First law of Thermodynamics

(B) Zeroth law of Thermodynamics

(C) Second law of Thermodynamics

(D) Third law of Thermodynamics

Answer: B

24. Which of the following is the efficiency of a Carnot engine(a = Temperature of source, b=Temperature of sink)?

(A) 1 – b/a

(B) 1 – a/b

(C) 1 + b/a

(D) 1 + a/b

Answer: A

25. What kind of waves are produced in a cylinder containing a liquid by moving its piston back and forth?

(A) Transverse

(B) Longitudinal

(C) Transverse or longitudinal

(D) None of the above

Answer: B

26. What is the relation between frequency(ν) and angular frequency(ω) of a wave?

(A) ν = π/ω

(B) ν = π/ω

(C) ν = 2πω

(D) ν = 2π/ω

Answer: C

27. With reference to a swinging pendulum, which among the following statements is correct when it is at bottom (middle of arc)?

(A) It has maximum kinetic energy and minimum potential energy

(B) It has maximum potential energy and minimum kinetic energy

(C) It has zero kinetic energy

(D) It has zero total energy

Answer: A

28. In which among the following, the speed of sound would be maximum?

(A) Dry air at 0°C

(B) Dry air at 30°C

(C) Humid air at 0°C

(D) Humid air at 30°C

Answer: D

29. What is supersonic speed?

(A) When the speed of any object exceeds the speed of sound

(B) When the speed of any object exceeds the speed of light

(C) When the speed of any object exceeds 10000 m/s

(D) None of the above

Answer: A

30. In which of the following mediums will sound travel with greater speed at 0° C?

(A) Aluminium

(B) Water

(C) Hydrogen

(D) Same in all of the above

Answer: A

31. On which among the following, the speed of the sound depends?

1.Amplitude

2.Wavelength

3.Humidity

32. Select the correct option from the codes given below:

(A) Only 3

(B) Only 2 & 3

(C) 1, 2 & 3

(D) None

Answer: A

32. Which among the following play role in the formation of Rainbow?

33. Dispersion
34. Total Internal Reflection
35. Refraction

33. Select the correct option from the codes given below:

(A) Only 1 & 2

(B) Only 2 & 3

(C) Only 1 & 3

(D) 1, 2 & 3

Answer: D

33. What is the gravitational potential energy for infinite distance?

(A) 0

(B) infinity

(C) 9.8 J

(D) None of the above

Answer: A

34. Two satellites, A having mass of 500 kgs and B having mass of 1200 kgs, are launched from earth. Which of these will have a greater orbital velocity if the radius of orbit is same for both?

(A) Satellite A

(B) Satellite B

(C) Both satellites will have the same orbital velocity

(D) Cant be determined

Answer: C

35. Which of the following sound waves are used in echocardiography?

(A) Infrasonic

(B) Ultrasonic

(C) Between 20 Hz and 2000 Hz

(D) None of the above

Answer: B

36. Which of the following can be measured using SONAR?

(A) distance of underwater objects

(B) direction of underwater objects

(C) speed of underwater objects

(D) All of the above

Answer: D

37. If the time taken in an echo is 5 seconds, which among the following will be the approximate distance of the object from source of sound? (assume normal room temperature at 20°C)

(A) 1715 meters

(B) 1256 meters

(C) 857 meters

(D) 554 meters

Answer: C

38. Speed of light will be maximum in which of the following mediums?

(A) Water

(B) Kerosene

(C) Flint Glass

(D) Diamond

Answer: A

39. Which of the following is NOT correct about Vectors addition?

(A) Vectors addition is associative

(B) Vectors addition is commutative

(C) Vectors of different natures can be added

(D) None of the above

Answer: C

40. The thrust on the rocket is:

(A) in the same direction of the rocket

(B) in the opposite direction of the rocket

(C) at 90° to the direction of the rocket

(D) None of the above

Answer: B

41. What is the coefficient of restitution for a perfectly elastic collision?

(A) 0

(B) 1

(C) -1

(D) 100

Answer: B

42. Which of the following is correct about acceleration due to gravity?

(A) it increases with depth

(B) it decreases with depth

(C) it is independent of depth

(D) None of the above

Answer: B

43. Which of the following is correct about a Sound wave?

(A) It is a mechanical wave

(B) It is an electromagnetic wave

(C) It is both a mechanical and electromagnetic wave

(D) It is neither a mechanical nor an electromagnetic wave

Answer: A

44. Which among the following is / are correct statements?

1. Friction converts Kinetic energy to radiation energy
2. A collision of two bodies can be said to be perfectly inelastic if no energy is exchanged between them

45. Select the correct option from the codes given below:

(A) Only 1

(B) Only 2

(C) Both 1 & 2

(D) Neither 1 nor 2

Answer: A

46. What is the dot product of two perpendicular vectors?

(A) 1

(B) 0

(C) -1

(D) 1/2

Answer: B

47. Work done will NOT be zero in which of the following case/cases?

(A) When displacement is zero

(B) When angle between force and displacement vector is zero

(C) When angle between force and displacement vector is 90°

(D) When force is zero

Answer: B

48. With respect to the measurements of the acceleration g due to the gravity of the Earth, different values of g are found at different?

1. Depths
2. Altitudes
3. Longitudes
4. Latitudes

49. Select the correct option from the codes given below:

(A) 1& 2

(B) 1, 2 & 3

(C) 1, 2 & 4

(D) 1, 2, 3 & 4

Answer: D

50. Which of the these physical quantities is a vector quantity?

(A) Temperature

(B) Speed

(C) Gravitational Intensity

(D) Work

Answer: C

51. As per the Newton’s second law of motion, what is the relation between the rate of change of linear momentum and the external force applied?

(A) directly proportional

(B) inversely proportional

(C) independent of each other

(D) None of the above

Answer: B

52. Which of these are called as Universal logic gates?

(A) NAND

(B) NOR

(C) NOT

(D) Both a and b

Answer: D

Also check– GK questions on General Science