# Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 7 - 15 of 219

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## Question number: 7

» Physics » Sound

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MCQ▾

### Question

A source of sound is producing oscillations in . Then its frequency (in Hz) of is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 8

» Physics » Sound

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MCQ▾

### Question

The time taken by the an object to travel one oscillation is called?

### Choices

Choice (4)Response

a.

Amplitude

b.

Time period

c.

Acceleration

d.

Frequency

## Question number: 9

» Physics » Force and Pressure

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MCQ▾

### Question

Thrust is equal to

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 10

» Physics » Sound

Edit
MCQ▾

### Question

A source is produced oscillations in . Therefore, its frequency is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 11

» Physics » Sound

Edit
MCQ▾

### Question

Which of the following does not produced noise pollution?

### Choices

Choice (4)Response

a.

Bomb blast

b.

Loud speaker.

c.

Television

d.

Horn of vehicle

## Question number: 12

» Physics » Sound

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MCQ▾

### Question

If frequency of a sound wave is , then number of oscillations in is:

### Choices

Choice (4)Response

a.

9000

b.

18000

c.

150

d.

90

## Question number: 13

» Physics » Sound

Edit
MCQ▾

### Question

The unit of loudness is:

### Choices

Choice (4)Response

a.

decibel

b.

Second

c.

d.

meter

## Question number: 14

» Physics » Sound

Edit
MCQ▾

### Question

An object oscillates times in , therefore its frequency is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 15

» Physics » Sound

Edit
MCQ▾

### Question

The voices of male and female are different, because of:

### Choices

Choice (4)Response

a.

Lungs

b.

Wind pipe

c.

Larynx

d.

Vocal chords

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