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

The bridge circuit of full wave rectification uses

Question # 2

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 3

The impedance of RLC series resonance circuit at resonant frequency is

Question # 4

An A.C varies as a function of

Question # 5

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

Question # 6

Transmitting antenna emits

Question # 7

The Instantaneous value of alternative current maybe:

Question # 8

A P-N juction or semiconductor diode cannot be used as

Question # 9

The time interval during which the Voltage source changes its polarity once is known as:

Question # 10

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 11

For the normal operation of the transistor, its

Question # 12

The average of A.C. current and voltage over a complete cycle is

Question # 13

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

Question # 14

The amplifier which us used to perform mathematical operations electronically is known as

Question # 15

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
2 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
3 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
6 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
7 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
8 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
9 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
10 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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