set 9 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements :

1. Bells are made of metal and not of wood because the sound is not conducted by metals but is radiated.
2. The rate of transfer of energy in a wave depends directly on the square of the wave amplitude and square of the wave frequency.

a) 1 and 2 both

b) 1 only

c) 2 only

d) None

Question : 2

The simple harmonic motion of a particle is given by y = 3 sinω + 4 cosω. Which one of the following is the amplitude of this motion?

a) 5

b) 1

c) 7

d) 12

Question : 3

Material A has a critical angle $i_A$, and material B has a critical angle $i_B$ ($i_B > i_A$). Then which of the following is true?

1. Light can be totally internally reflected when it passes from B to A
2. Light can be totally internally reflected when it passes from A to B
3. Critical angle for total internal reflection is $i_B – i_A$
4. Critical angle between A and B is $sin^{-1}({sini_A}/{sini_B})$

a) 2 and 3

b) 1 and 3

c) 1 and 4

d) 2 and 4

Question : 4

If a liquid is heated in condition of weightlessness, the heat is transmitted through

a) radiation

b) conduction

c) convection

d) None, because the liquid cannot be heated in weightlessness

Question : 5

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

Question : 6

‘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