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 : 11

At sunrise or at sunset the sun appears to be reddish while at mid-day it looks white. This is because

a) refraction causes this phenomenon

b) scattering due to dust particles and air molecules causes this phenomenon

c) the sun is cooler at sunrise or at sunset

d) diffraction sends red rays to the earth at these times

Answer: (b)

Question : 12 [IAS (Pre) 1994]

Which one of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure?

a) f-8, 1/250

b) f-16, 1/125

c) f-22, 1/60

d) f-5.6, 1/1000

Answer: (c)

Question : 13

Rear-view mirror used in a vehicle is a

a) plane mirror

b) concave mirror

c) convex mirror

d) None of these

Answer: (c)

Question : 14 [UPPCS (Mains) 2008]

The least distance (in cm) of distinct vision in

a) 75

b) 5

c) 25

d) 100

Answer: (c)

Question : 15 [UPPCS (Pre) 1995]

Maximum temperature inside pressure cooker depends on

a) Area of hole on the top and food being cooked

b) Weight kept on hole at top and food being cooked

c) Area of hole on the top and weight kept on it

d) Area of hole on the top only

Answer: (c)

IMPORTANT general science mcq EXERCISES

set 16 Online Quiz

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1654 heat wave motion sound optics oscillations based general science mcq set 16 question answer pdf
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