set 9 MCQ Questions & Answers Detailed Explanation

Question : 1

Two spheres of same size are made of the same metal but one is hollow and the other is solid. They are heated to same temperature, then

a) solid sphere will expand more than the hollow one

b) both spheres will expand equally

c) hollow sphere will expand more than the solid one

d) None of the above

Question : 2

The fine powder of a coloured glass is seen as

a) black

b) coloured

c) white

d) that of the glass colour

Question : 3

Heat travels through vacuum by

a) Radiation

b) Conduction

c) Convection

d) Both (a) and (b)

Question : 4

What changes will the volume of water show if the temperature is lowered from 9ºC to 3ºC?

a) The volume will first increase and then decrease

b) The volume will first decrease and then increase

c) The volume will not change

d) Water will freeze

Question : 5

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 : 6

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