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 [UPPCS (Mains) 2014]

The colour of light is determined by its

a) Intensity

b) Wavelength

c) Amplitude

d) Velocity

Answer: (b)

Question : 27 [NDA]

Which one of the following is not electromagnetic in nature?

a) X-rays

b) Cathode-rays

c) Gamma-rays

d) Infrared-rays

Answer: (b)

Question : 28 [UPPCS (Pre) 2007]

Thermostat is a device which

a) Measures temperature

b) Automatically regulates the temperature of a system

c) Measures heat

d) Automatically regulates pressure of a system

Answer: (b)

Question : 29 [UP UDA/LDA (Pre) 2013]

The Sky appears blue due to

a) Blue light is minimum absorbed by atmosphere

b) The red colour is scattered most

c) Blue colour is scattered most

d) Red light is ultimately absorbed by atmosphere

Answer: (c)

Question : 30 [IAS (Pre) 1996]

Total internal reflection can take place when light travels from

a) Air to water

b) Water to glass

c) Diamond to glass

d) Air to glass

Answer: (c)

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