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
12. Planets do not twinkle because
- they emit light of a constant intensity
- their distance from the earth does not change with time
- they are very far away from the earth resulting in decrease in intensity of light
- they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
13. Metals are good conductors of electricity because
- they contain free electrons
- the atoms are lightly packed
- they have high melting point
- All of the above
14. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
- will overflow
- will not rise
- depressed
- change its meniscus
15. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
- Pressure and Young's modules
- Planck's constant and Angular momentum
- Impulse and moment of force
- Force and rate of change of linear momentum
16. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
- velocity
- momentum
- acceleration
- kinetic energy
18. Rectifiers are used to convert
- Direct current to Alternating current
- Alternating current to Direct current
- high voltage to low voltage
- low voltage to high voltage
19. out of the following, which is not emitted by radioactive substance?
- Electrons
- Electromagnetic radiations
- Alpha particles
- Neutrons