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 r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 3

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 4

The output voltage of half wave rectification is in the form of

Question # 5

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

Question # 6

In n-p-n transistor, emitter base junction is kept

Question # 7

The waveform of alternating voltage is a:

Question # 8

In half wave rectification

Question # 9

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 10

Which one of the following is correct?

Question # 11

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 12

The magnitude of alternative voltage V:

Question # 13

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

Question # 14

The input resistance of the OP-AMP is the resistance between the

Question # 15

The sum of positive and negative peak values is called:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
2 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
3 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
4 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
5 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
6 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
7 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
8 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
9 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
10 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these

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