Oscillations and Waves (AIIMS Physics): Questions 29 - 33 of 50

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Question number: 29

» Oscillations and Waves » Periodic Motion - Period Frequency

MCQ▾

Question

At a certain instant of time, displacement of a harmonically oscillating body is +0.02m and acceleration is 8.0ms and amplitude is 0.08 m. So what is the velocity of the oscillator at this instant of time?

Choices

Choice (4) Response

a.

1.55ms

b.

2.05ms

c.

1.0ms

d.

2.5ms

Question number: 30

» Oscillations and Waves » Harmonics

MCQ▾

Question

A boat at anchor is rocked by waves whose crests are 240 m apart and velocity is 30ms . The boat bounces up once in every –

Choices

Choice (4) Response

a.

4 s

b.

12 s

c.

0.125 s

d.

8 s

Question number: 31

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

MCQ▾

Question

An organ pipe closed at one end has fundamental frequency of 1000 Hz. The maximum number of overtones generated by this pipe which a normal person can hear is –

Choices

Choice (4) Response

a.

10

b.

8

c.

9

d.

5

Question number: 32

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

The tension in a piano wire is 20N. What should be the tension in the wire to produce a note of three times of the frequency?

Choices

Choice (4) Response

a.

110N

b.

120N

c.

180N

d.

140N

Question number: 33

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

Assertion-Reason▾

Assertion (Ꭺ)

The flash of lighting is seen before the sound of thunder is heard.

Reason (Ꭱ)

Speed of sound is greater than speed of light.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

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

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