Oscillations and Waves-Simple Harmonic Motion (NEET Physics): Questions 10 - 13 of 36

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Question number: 10

» Oscillations and Waves » Simple Harmonic Motion » Energy

MCQ▾

Question

Three simple harmonic motions in the same direction having the same amplitude a and same period are superposed. If each differs in phase from the next by 45°, then -

(1) The resultant amplitude is (1+2)a , and the phase of the resultant motion relative to the first is 90°

(2) The energy associated with the resulting motion is

(3) Times the energy associated with any single motion

(4) The resulting motion is not simple harmonic

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

Question number: 11

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

MCQ▾

Question

A particle of mass m is attached to three identical springs A, B and C each of force constant k. If the particle of mass m is pushed slightly against the spring A and released then the time period of oscillations is

Choices

Choice (4) Response

a.

2πm2k

b.

2πmk

c.

2π2mk

d.

2πm3k

Question number: 12

» Oscillations and Waves » Simple Harmonic Motion » Energy

MCQ▾

Question

A particle executes simple harmonic motion with a frequency f. The frequency with which its kinetic energy oscillates is

Choices

Choice (4) Response

a.

f

b.

4f

c.

f2

d.

2f

Question number: 13

» Oscillations and Waves » Simple Harmonic Motion » Force, Velocity, and Acceleration

Assertion-Reason▾

Assertion (Ꭺ)

Consider motion for a mass spring system under gravity, motion of M is not a simple harmonic motion unless Mg is negligibly small.

Reason (Ꭱ)

For simple harmonic motion acceleration must be proportional to displacement and is directed towards the mean position.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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