# Physics-Sound (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 4 of 12

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## Question number: 1

» Physics » Sound

Appeared in Year: 2013

MCQ▾

### Question

A ship sends a sonar wave to the sea bed, which is flat and measured several times over a large area. One day the reflected sound wave takes longer time than in previous measurements. The possible reason is

### Choices

Choice (4) Response

a.

The frequency of the sonar wave, generated by the equipment is lower than previous measurements

b.

The loudness of the sonar wave, generated by the equipment is lower than previous measurement

c.

There is a huge air bubble in the path of sonar wave

d.

There is a solid object of large size in the path of sonar wave

## Question number: 2

» Physics » Sound

MCQ▾

### Question

The diagram below shows the propagation of a wave. Which points are in same phase?

### Choices

Choice (4) Response

a.

B and G

b.

B and F

c.

F and G

d.

C and E

## Question number: 3

» Physics » Sound

MCQ▾

### Question

Which one of the following emits sound of higher pitch?

### Choices

Choice (4) Response

a.

Man

b.

Mosquito

c.

Lion

d.

Woman

## Question number: 4

» Physics » Sound

MCQ▾

### Question

If one puts ones ears to the steel rail, the sound of a coming train can be heard even when the train cannot be seen. One can conclude from this observation that

I. sound travels faster in steel than in air.

II. amplitude of sound in the rail is much larger than in air.

III. sound can travel larger distances in solids than in air.

IV. quality of sound in rail is better than in air.

The reasonable conclusions are

### Choices

Choice (4) Response

a.

I and II

b.

I and III

c.

II and III

d.

None of the above

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