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 : 21 [NDA]

The standing wave pattern along a string of length 60 cm is shown in the above diagram. If the speed of the transverse waves on this string is 300 m/s, in which one of the following modes is the string vibrating ?

sound oscillations heat thermodynamics question answer 24

a) First overtone

b) Fundamental

c) Second overtone

d) Third overtone

Answer: (c)

Question : 22

A metal sheet with a circular hole is heated. The hole

a) remains of the same size

b) gets larger

c) gets smaller

d) gets deformed

Answer: (b)

Question : 23 [PCS (Pre) 2013]

The Doppler’s effect is applicable for

a) Sound waves

b) Space waves

c) Light waves

d) Both (a) and (c)

Answer: (d)

Question : 24 [UPPCS (Pre) 2007]

The safest temperature for keeping food fresh in a refrigerator is

a) 8°C

b) 0°C

c) 4°C

d) 10°C

Answer: (c)

Question : 25 [UPPCS (Mains) 2012]

The diamond appears lustrous because of

a) Total internal reflection

b) Refraction

c) Reflection

d) Scattering

Answer: (a)

IMPORTANT general science mcq EXERCISES

set 15 Online Quiz

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1653 heat wave motion sound optics oscillations based general science mcq set 15 question answer pdf
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