ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

In which of the following components, pn-junction is used

Question # 2

The wave form of alternating voltage is the graph between:

Question # 3

For the normal operation of the transistor, its

Question # 4

The device which allows only the flow of an A.C. through a circuit is

Question # 5

The value of the input resistance of OP-AMP is of the order of

Question # 6

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 7

Peak value of alternative current is:

Question # 8

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 9

The phase at the positive peak of an A.C. cycle is:

Question # 10

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 11

The Instantaneous value of alternative current maybe:

Question # 12

In RLC series circuit, resonance occurs when

Question # 13

Which of the following diodes can operate in the reverse biased condition

Question # 14

In half wave rectification

Question # 15

A digital system deals with quantities or variables which have

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
2 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
3 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
4 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
5 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
6 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
7 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
8 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
9 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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