# Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 59 - 64 of 73

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## Question number: 59

» Physics » Source of Energy

MCQ▾

### Question

The site of a hydroelectric plant should be chosen carefully because it

### Choices

Choice (4) Response

a.

produces a large amount of carbon mono-oxide and carbon dioxide

b.

affects the organism of region

c.

produces a large amount of electricity

d.

is expensive

## Question number: 60

» Physics » Sound

MCQ▾

### Question

In a medium, sound travels 2 km in 3 s and in air, it travels 3 km in 10 s. The ratio of the wavelength of sound in the two medium is

### Choices

Choice (4) Response

a.

1: 18

b.

8: 1

c.

1: 8

d.

20: 9

## Question number: 61

» Physics » Sound

MCQ▾

### Question

Sonar emits which of the following waves?

### Choices

Choice (4) Response

a.

Light waves

b.

Magnetic waves

c.

d.

Ultrasonic waves

## Question number: 62

» Physics » Sound

MCQ▾

### Question

Which of the following is the longitudinal wave?

### Choices

Choice (4) Response

a.

Water waves

b.

Waves on plucked string

c.

Sound waves

d.

Light waves

## Question number: 63

» Physics » Light

MCQ▾

### Question

Two plane mirrors are inclined to each other at an angle of as shown in figure. A ray of light falls on the mirror at angle and after reflection, falls on the other mirror from which it get reflected by angle i. The value of third angle is?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 64

» Physics » Motion and Force

MCQ▾

### Question

The figure shown below depicts the distance travelled by a body as a function of time.

The average speed and maximum speed between 0 and 20 s are

### Choices

Choice (4) Response

a.

2.0 m/s, 2.6 m/s respectively

b.

1 m/s, 2.0 m/s respectively

c.

1.3 m/s, 2.0 m/s respectively

d.

1 m/s, 1.6 m/s respectively

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