set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following does NOT allow harmful ultraviolet radiations from the sun to reach the earth?

a) NO₂

b) CO₂  

c) O₂  

d) O₃  

Question : 2

Television signals are

a) amplitude modulated

b) both frequency and amplitude modulated

c) frequency modulated

d) phase modulated

Question : 3

If an a-particle is projected normally through a uniform magnetic field, then the path of the a-particle inside the field will be

a) parabolic

b) elliptical

c) circular

d) a straight line

Question : 4

At the present level of technology available in India, solar energy can be conveniently used to :

1. Supply hot water to residential buildings.
2. Supply water for minor irrigation projects.
3. Provide street lighting.
4. Electrify a cluster of villages and small towns.

a) 2 and 4

b) 1 and 3

c) 1, 2, 3 and 4

d) 1, 2 and 3

Question : 5

The main constituent of biogas is

a) carbon dioxide

b) hydrogen

c) methane

d) hydrogen sulphide

Question : 6

Which among the following statements are the requirements of good source of energy?

1. It should do a large amount of work per unit volume or mass.
2. It should be easily accessible.
3. It should be easy to store and transport.
4. It should be economical.

a) A, B, C

b) B, C, D

c) A, B

d) All of thesegenerator.