set 5 MCQ Questions & Answers Detailed Explanation

Question : 1

When electrical energy is converted into motion

a) Heat loss is 30 percent

b) There is no heat loss

c) Heat loss is 50 percent

d) Heat loss is 80 percent

Question : 2

Consider the following statements :

1. An ammeter is always connected in series in the circuit.
2. A voltmeter can only be connected in series in the circuit.
3. A voltmeter has low resistance.

a) 1 only

b) 1 and 2

c) 2 and 3

d) 3 only

Question : 3

An electric motor is a device

a) That works on the principle described by Fleming’s left hand rule

b) That converts electrical energy to mechanical energy

c) Both (a) and (b)

d) Neither (a) nor (b)

Question : 4

Which one among the following is the correct order of power consumption for light of equal intensity ?

a) CFL tube < Fluorescent tube < Light emitting diode < Incandescent bulb

b) CFL tube < Fluorescent tube < Incandescent bulb < Light emitting diode

c) Light emitting diode < CFL tube < Fluorescent tube < Incandescent bulb

d) Incandescent bulb < Light emitting diode < Fluorescent tube < CFL tube

Question : 5

Match list-I with list -II:

a) 2 1 4 3

b) 3 1 4 2

c) 3 4 1 2

d) 2 4 1 3

Question : 6

In a p-n junction

a) the p side is at higher electrical potential than n side

b) the n side is at higher electric potential than p side

c) the potential of p & n sides becomes higher alternately

d) both p & n sides are at same potential