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 : 1 [UPPCS (Pre) 2015]

In order to avoid Sunlight, which of the following colour combination for an umbrella is most appropriate?

a) Only black

b) Top white and bottom black

c) Top black and bottom white

d) Only white

Answer: (b)

Question : 2 [NDA]

The graph given above indicates change in temperature (Dt) when heat (Q) was given to a substance. Which among the following parts of the graph correctly depict the latent heat of the substance?

sound oscillations heat thermodynamics question answer 47

a) BC and DE

b) AB and BC

c) CD and DE

d) DE and AB

Answer: (a)

Question : 3 [UPPCS (Pre) 2008]

In which of the following conditions wet clothes will dry earliest?

a) 100% RH, 20ºC temperature

b) 20% RH, 20ºC temperature

c) 100% RH, 60ºC temperature

d) 20% RH, 60ºC temperature

Answer: (d)

Question : 4 [RAS/RTS (Pre) 1992]

‘Raman effect’ deals with the light rays passing through

a) Only diamonds

b) Only prisms

c) Only fluids

d) All transparent medium

Answer: (d)

Question : 5

Expansion during heating

a) decreases the density of a material

b) occurs only in solids

c) increases the weight of a material

d) occurs at the same rate for all liquids and solids

Answer: (a)

Solids, liquids and gases all expand on being heated as a result,

Density = (mass/volume) decreases.

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