set 8 MCQ Questions & Answers Detailed Explanation

Question : 1

In charging a battery of motor car, the following effect of electric current is used

a) heating

b) chemical

c) magnetic

d) induction

Question : 2

The ratio of the focal length of the objective to the focal length of the eyepiece is greater than one for

a) both microscope and telescope

b) a microscope

c) a telescope

d) neither microscope nor telescope

Question : 3

Some pairs of devices and associated energy changes are given below.

1. Electric generator - Mechanical to electrical
2. Electric motor - Electrical to mechanical
3. Diesel engine - Light to electrical
4. Solar cell - Chemical to mechanical

a) 2 and 4

b) 1 and 2

c) 1 and 3

d) 3 and 4

Question : 4

Full form of C.F.L. is

a) Chemical Fluorescent Lamp

b) Compact Fluorescent Lamp

c) Centrally Fixed Lamp

d) Condensed Fluorescent Lamp

Question : 5

The electric current does not flow between two properly connected charged bodies if they are having

a) Same resistivity

b) Same charge

c) Same capacity

d) Same potential

Question : 6

Consider the following statements.
Assertion (A):
Lightning conductors prevent buildings from damages in the event of lightning strike.
Reason (R):
The electric charge conduct to ground through the wire, instead of passing through the structure.
Select the correct answer using the codes given below.
Code

a) (A) is true, but (R) is false

b) Both (A) and (R) are true and (R) is the correct explanation of (A)

c) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

d) (A) is false, but (R) is true