Physics Questions and Answers
General Knowledge Physics Questions with Answers focus on principles and concepts of physics. Common in SSC, UPSC, and Banking exams, they help candidates strengthen scientific reasoning and problem-solving skills
Physics
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77 questions
51. Out of the following pairs, which one does not have identical dimension?
- Moment of inertia and moment of a force
- Work and Torque
- Angular momentum and Planck's constant
- Impulse and Momentum
52. Mercury is commonly used as a thermometric fluid rather than water because
- specific heat of mercury is less than water
- specific heat of mercury is more than water
- mercury has greater visibility than water
- density of mercury is more than the water
53. Optical fibre works on the
- principle of refraction
- total internal reflection
- scattering
- interference
54. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
- 4.2 seconds
- 42 seconds
- 4.2 years
- 42 years
55. Supersonic plane fly with the speed
- less than the speed of sound
- of sound
- greater than the speed of sound
- of light
56. Mach number is used in connection with the speed of
- sound
- aircraft
- spacecraft
- ships
57. On a stationary sail boat, air is blown from a fan attached to the boat. The boat
- moves in opposite direction in which the air is blown
- does not move
- moves in the same direction in which air blows
- spins around
58. Rainbow is due to
- absorption of sunlight in minute water droplets
- diffusion of sunlight through water droplets
- ionisation of water deposits
- refraction and reflection of sunlight by water droplets
59. Stars which appear single to the naked eye but are double when seen through a telescope are
- novas and supernovas
- binaries
- asteroids
- quasars
60. Solar eclipse will take place when
- the sun is between the moon and the earth
- the earth is between the moon and the sun
- the moon is between the sun and the earth
- the moon does not lie on the line joining the sun and the earth