StudentAidUnit 11: Unit 11: Special Theory of Relativity — Mcqs
11th Class Physics · Unit 11: Special Theory of Relativity
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Multiple Choice Questions
1.Relativistic mechanics yields results different from classical mechanics for objects moving with:
2.If an observer is moving in the same direction as a sound wave, the velocity of the wave seems to be:
3.If the rest mass of a particle m₀ increases to m due to its high speed, then its kinetic energy is:
4.The speed of beam light of a car while moving with high speed as compared to its rest position is:
5.A photon is a particle of light. What is its mass when it moves with 0.9 c?
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Relativistic velocity
1.Which one of the following physical quantities is independent of relativistic speed?
2.Relativistic velocity is of the order of:
3.The length of rod at rest as measured by an observer moving parallel to it with relativistic speed is given by:
- a ℓ = ℓ₀(1 - v²/c²)
- b ℓ = ℓ₀√(1 - v²/c²)
- c ℓ = ℓ₀/√(1 - v²/c²)
- d ℓ₀ = ℓ√(1 - v²/c²)
Einstein's mass energy equivalence
4.The energy 'E' equivalent to mass given by:
- a Ec²
- b E/c²
- c E/c
- d c²/E
Mass variation
5.The mass of an object will be doubled at the speed:
Length contraction
6.A rod at rest appears to an observer just a mere point when he moves across it as speed:
Non-inertial frame of reference
7.A non-inertial frame of reference:
- a Moves with some acceleration
- b Is always rest on earth
- c Moves with uniform velocity
- d All of the above
Theory of relativity
8.The theory of relativity was proposed in:
Relativistic length
9.If a space craft of rest length 'ℓ₀' is moving with a speed equal to speed of light, then its relativistic length 'ℓ' will be:
Variation of mass
10.If a material object moves with the speed of light 'c' its mass becomes: