set 5 MCQ Questions & Answers Detailed Explanation

Question : 1

The part of a transistor which is most heavily doped to produce large number of majority carriers is

a) base

b) collector

c) emmiter

d) can be any of the above three

Question : 2

The heating element of an electric heater should be made with a material, which should have

a) high specific resistance and low melting point

b) low specific resistance and low melting point

c) high specific resistance and high melting point

d) low specific resistance and high melting point

Question : 3

Consider the following statements :

1. An ammeter should have low resistance
2. An ammeter should have high resistance
3. A voltmeter should have low resistance
4. A voltmeter should have high resistance

a) 2 and 3

b) 1 and 4

c) 1 and 3

d) 2 and 4

Question : 4

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 : 5

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 : 6

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