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 : 6 [NDA]

Consider the following statements with reference to observations made by an astronaut on the surface of moon:

  1. The astronaut finds that a simple pendulum continues to oscillate for a much longer time, than that on the earth.
  2. No atmosphere exists there.
Which of the statements given above is/are correct ?

a) Only 2

b) Only 1

c) Both 1 and 2

d) Neither 1 nor 2

Answer: (c)

Question : 7 [RAS/RTS (Pre) 2003]

What is the decibel level of sound produced by two persons in conversation?

a) About 10 decibel

b) About 30 decibel

c) About 5 decibel

d) About 100 decibel

Answer: (b)

Question : 8

A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

a) Concave, plane and convex

b) Plane, convex and concave

c) Convex, concave and plane

d) Convex, plane and concave

Answer: (a)

Question : 9 [UP (Pre) 2009]

‘Endoscope’ used by the doctors for examining the inside of patient’s stomach, works on the principle of

a) Refraction of light

b) Dispersion of light

c) Reflection of light

d) Total internal reflection of light

Answer: (d)

Question : 10

For the construction of a thermometer, one of the essential requirements is a thermometric substance which

a) has a property that varies with temperature

b) has property that varies linearly with temperature

c) remains liquid over the entire range of temperatures to be measured

d) obey Boyle’s law

Answer: (a)

The temperature is measured by the value of the thermodynamic property of a substance.

i.e., the property which varies linearly with the temperature.

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set 9 Online Quiz

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1647 light thermodynamics sound optics and oscillations based general science mcq set 9 question answer pdf
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