set 9 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 : By the first law of thermodynamics, for solids

(a) δQ = δW + dU

(b) dQ = dU + dW

(c) dQ = dU

(d) δQ = δU / dW

The correct answers to the above question in:

Answer: (a)

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

Question : 1

In human eye, image of object forms at

a) Pupil

b) Iris

c) Cornea

d) Retina

Answer: (d)

Question : 2

Which of the following qualities suit for a cooking utensil?

a) Low specific heat and low thermal conductivity

b) High specific heat and low thermal conductivity

c) High specific heat and high thermal conductivity

d) Low specific heat and high thermal conductivity

Answer: (d)

Question : 3

The velocity of sound is maximum in

a) Liquid

b) Metal

c) Air

d) Vacuum

Answer: (b)

Question : 4

Suppose a rocketship is proceeding from the Earth at a speed of 2/10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the Earth?

a) Yellow

b) Orange

c) Blue

d) Yellow-Orange

Answer: (a)

Question : 5

Which one of the following phenomenon is used in optical fibres?

a) Total internal reflection

b) Refraction

c) Interference

d) Polarisation

Answer: (a)

Question : 6

An astronaut cannot hear his companion at the surface of the Moon because

a) Temperature is too low during night and too high during day

b) There is no medium for sound propagation

c) Produced frequencies are above the audio frequency

d) There are many craters on the surface of the Moon

Answer: (b)

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