Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 74 - 78 of 78

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Question number: 74

» Physics » Sound

MCQ▾

Question

Sound waves of wavelength greater than that of audible sound are called

Choices

Choice (4) Response

a.

ultrasonic waves

b.

sonic waves

c.

seismic waves

d.

infrasonic waves

Question number: 75

» 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: 76

» 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: 77

» Physics » Sound

MCQ▾

Question

Sonar emits which of the following waves?

Choices

Choice (4) Response

a.

Light waves

b.

Magnetic waves

c.

Radio waves

d.

Ultrasonic waves

Question number: 78

» 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

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