Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 59 - 63 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.

Radio waves

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 Equation as shown in figure. A ray of light falls on the mirror Equation at angle Equation and after reflection, falls on the other mirror Equation from which it get reflected by angle i. The value of third angle is?

Two plane mirrors named M1andM2

Two Plane Mirrors Named M1andM2

Find the third angle made by reflected ray from mirror M2

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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