set 5 MCQ Questions & Answers Detailed Explanation

Question : 1

For a transistor amplifier, the voltage gain

a) is high at high and low frequencies and constant in the middle frequency range.

b) is low at high and low frequencies and constant at mid frequencies.

c) remains constant for all frequencies.

d) none of the above

Question : 2

Two magnets A and B are placed with like poles having one above another. What will happen?

a) A will move side ways

b) A will stuck to B

c) A will remain as in figure

d) Can't say

Question : 3

The filament of an electric bulb is of tungsten because

a) it is cheaper

b) its melting point is high

c) its resistance is negligible

d) filament is easily made

Question : 4

A wire of resistance 16 W is bent in the form of a circle. What is the effective resistance between diametrically opposite points?

a) 4 W

b) 1 W

c) 2 W

d) 8 W

Question : 5

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 : 6

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