Competitive Exams: Physics MCQs (PracticeTest 19 of 35)

The particles of a medium oscillate about their equilibrium positions, whenever a wave travels through that medium, The phase difference between the oscillations of two such particles varies

with time but not with distance separating them

with distance separating them but not with time

with distance separating them as well as with time

neither with distance separating them nor with time


A mass of 1 kg suspended from a spring whose force constant is 400 Nm1, executes simple harmonic oscillation. When the total energy of the oscillator is 2 J, the maximum acceleration experienced by the mass will be

2 ms2

4 ms2

40 ms2

400 ms2


Consider the following statements: The total energy of a particle executing simple harmonic motion depends on its

amplitude.

period

displacement
Of these statements:

1 and 2 are correct

2 and 3 are correct

1 and 3 are correct

1, 2 and 3 are correct


Three simple harmonic oscillators, with amplitudes A1 > A2> A3, pass through their respective equilibrium positions with the same velocity. If these oscillators have the same mass, then their characteristic frequencies w1, w2, w3 will be related to each other as.

w1 A1 = w2 A2 = w3 A3

w1 2 A1 = w2 2 A2 = w3 2 A3

w1 A1 2 = w2 A2 2 = w3 2 A32

(w1/A1) = (w2/A2) = (w3/A3)


Two simple harmonic waves of the same amplitude and frequency differ by a phase p/2 When they are fed simultaneously to the Xand yplates of C. R. O. the screen would display the trace of

a circle

an ellipse

a straight line

a square


The amplitude of the vibrating particle due to superposition of two SHMs yl = sin (wt + p/3) and y2 = sin wt

1

2 ½

3 ½

2
