light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions

light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]

set 1

set 2

set 3

set 4

set 5

set 6

set 7

set 8

set 9

set 10

set 11

set 12

set 13

set 14

set 15

set 16

Question : 26

Placement of another identical prism in an inverted position with respect to the first and allowing the colours of spectrum to pass through it will

a) keep the spectrum as before

b) change the spectrum into white light

c) change the spectrum into a black band

d) split into more colours

Answer: (b)

Placement of another identical prism in an inverted position with respect to the first and allowing the colours of spectrum to pass through it will change the spectrum into white light.

Question : 27 [IAS (Pre) 2001]

When light waves pass from air to glass the variable affected are

a) Wavelength and frequency

b) Velocity and frequency

c) Wavelength, frequency and velocity

d) Wavelength and velocity

Answer: (d)

Question : 28 [RAS/RTS (Pre) 2012]

In television broadcast, the picture signals are transmitted by

a) Frequency modulation

b) Phase modulation

c) Amplitude modulation

d) Angle modulation

Answer: (c)

Question : 29

Good absorbers of heat are

a) good emitters

b) poor emitters

c) non-emitters

d) highly polished

Answer: (a)

Good absorbers are always good emitters of heat.

Question : 30 [IAS (Pre) 2000]

Assertion (A):
Small glass beads fixed on traffic signals glow brightly when light falls upon them.
Reason (R):
Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
Code

a) (A) is true, but (R) is false

b) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Answer: (c)

IMPORTANT general science mcq EXERCISES

set 14 Online Quiz

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1652 heat wave motion sound optics oscillations based general science mcq set 14 question answer pdf
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