set 15 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 16 EXERCISES

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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq

Questions : 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

The correct answers to the above question in:

Answer: (b)

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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers

Question : 1

The Doppler’s effect is applicable for

a) Sound waves

b) Space waves

c) Light waves

d) Both (a) and (c)

Answer: (d)

Question : 2

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 : 3

The diamond appears lustrous because of

a) Total internal reflection

b) Refraction

c) Reflection

d) Scattering

Answer: (a)

Question : 4

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 : 5

What is the use of thermostat?

a) To increase the temperature

b) To maintain the temperature

c) To measure the temperature

d) To convert heat into electricity

Answer: (b)

Question : 6

Long radio waves are reflected by which of the following layer of Earth’s surface?

a) Tropopause

b) Ionosphere

c) Troposphere

d) Stratosphere

Answer: (b)

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