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The MCQs below are drawn from the Physics subject category.
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431
Which of the following has the highest moment of inertia when each of them has the same mass and the same radius?
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Correct Option
Explanation
Moments: ring = M R^2 (largest), spherical shell = 2/3 M R^2, solid sphere = 2/5 M R^2, disc = 1/2 M R^2; ring is highest.
432
The special theory of relativity was presented by
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Correct Option
Explanation
Albert Einstein presented the special theory of relativity, so Einstein is the correct scientist.
433
The special theory of relativity was presented in
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Correct Option
Explanation
Albert Einstein presented the special theory of relativity in 1905, making 1905 the correct year.
434
The special theory of relativity is based on:
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Correct Option
Explanation
Einstein's special relativity is founded on two postulates (principle of relativity and constancy of light speed), so option C is correct.
435
According to special theory of relativity if an object is moving with the velocity of light, its mass
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Correct Option
Explanation
As an object's speed approaches the speed of light its relativistic mass tends to infinity, preventing massive objects from reaching c.
436
According to the special theory of relativity, the laws of physics in different frame of references are
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Correct Option
Explanation
Einstein's special relativity states the laws of physics are the same in all inertial frames, so they are the same when frames are inertial.
437
The special theory of relativity is applicable to the objects moving with maximum velocity
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Correct Option
Explanation
Special relativity applies to inertial frames and objects moving at velocities up to (but not exceeding) the speed of light, so option B is correct.
438
Special theory of relativity was presented by
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Correct Option
Explanation
Albert Einstein proposed the special theory of relativity in 1905.
439
Albert Einstein wrote his famous 'Special Theory of Relativity' in
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Correct Option
Explanation
Einstein published his Special Theory of Relativity in 1905, which is the recognized publication year.
440
If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should
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Correct Option
Explanation
Cooling releases energy from the system, and by mass-energy equivalence the mass would decrease slightly when water forms ice.
