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The MCQs below are drawn from the Physics subject category.
Showing 451–460
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451
A particle executes S.H.M. then the graph of acceleration as a function of displacement is a
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Correct Option
Explanation
For S.H.M. a = -ω^2 x, so acceleration is linearly proportional to displacement, giving a straight line.
452
A force of 20 N is applied on an elastic spring. If the extension produced in the spring is 10 cm, the value of spring constant is
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Correct Option
Explanation
k = F/x = 20 N / 0.1 m = 200 N/m.
453
Equalizing pulses in TV are located throughout the
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Correct Option
Explanation
Equalizing pulses are part of the vertical blanking interval in TV signal timing.
454
A steel wire of length 10 m has a mass of 0.2 kg. If the wire has a tension of 800 N, what is the wave velocity (in m/s) of the wire?
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Correct Option
Explanation
Linear mass density μ = 0.2/10 = 0.02 kg/m; wave speed v = sqrt(T/μ) = sqrt(800/0.02) = sqrt(40000) = 200 m/s.
455
In case of standing waves produced in the string, f1 is
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Correct Option
Explanation
The OCR indicates the 'Half of' option is marked; thus f1 is half of the compared frequency in the given context.
456
A body experiences SHM with an amplitude. When this body is at its maximum displacement, its phase is
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Correct Option
Explanation
Maximum positive displacement corresponds to phase π/2 (where sinφ = 1) in the usual x = A sinφ representation.
457
A water wave is an example of
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Correct Option
Explanation
Surface water waves involve transverse motion of the medium, so they are transverse waves.
458
A plane of polarization is one in which
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Correct Option
Explanation
A plane of polarization is defined as the plane in which the vibrations (of the electric field) occur.
459
If amplitude of a simple pendulum is increased by 4 times, the time period will be:
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Correct Option
Explanation
For small amplitudes the period of a simple pendulum is independent of amplitude; OCR marks option C.
460
Which analysis is employed to convert a complex sound into notes?
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Correct Option
Explanation
Fourier analysis decomposes complex sounds into constituent frequencies (notes), so Fourier theorem is correct.
