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

A changing magnetic flux creates around itself

Question # 2

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

Question # 3

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

Question # 4

The impedance of RLC series resonance circuit at resonant frequency is

Question # 5

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

Question # 6

During the positive half-cycle in the half-wave rectification,the diode

Question # 7

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

Question # 8

A diode characteristic curve is a plot between

Question # 9

Most OP-AMP operates with

Question # 10

In series RC circuit when R=Xc, then the phase angle is

Question # 11

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

Question # 12

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 13

A digital system deals with quantities or variables which have

Question # 14

For a n-p-n transistor, the conventional current equation can be written as

Question # 15

The entire wave form of sinusoidal voltage is actually a set of all the:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
2 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
3 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
4 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
5 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
6 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
7 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
8 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
9 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
10 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them

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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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