set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements

1. Clear sky appears blue due to poor scattering of blue wavelength of visible light.
2. Red part of light shows more scattering than blue light in the atmosphere.
3. In the absence of atmosphere, there would be no scattering of light and sky will look black.

a) Only 3

b) Only 1

c) 1 and 2

d) All of these

Question : 2

If a body is positively charged, then it has

a) excess of protons

b) deficiency of electrons

c) excess of electrons

d) deficiency of neutrons

Question : 3

Which gas is filled in normal tubelights?

a) Mercury vapour with argon

b) Sodium vapour with argon

c) Sodium vapour with neon

d) Mercury vapour with neon

Question : 4

Magnetic meridian is a

a) vertical plane

b) point

c) horizontal plane

d) line along N-S

Question : 5

A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens?

a) + 0. 8 D

b) – 0.8 D

c) – 3.0 D

d) + 3.0 D

Question : 6

How many units of electricity will be consumed if you use a 60 watt electric bulb for 5 hours everyday for 30 days?

a) 6

b) 12

c) 9

d) 3