# Oscillations and Waves (AIIMS (All India Institute of Medical Sciences) 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 and acceleration is and amplitude is 0.08 m. So what is the velocity of the oscillator at this instant of time?

### Choices

Choice (4) Response

a.

b.

c.

d.

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## 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. The boat bounces up once in every –

### Choices

Choice (4) Response

a.

4 s

b.

12 s

c.

0.125 s

d.

8 s

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## 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

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## 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

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## 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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