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 phase angle of a series RLC circuit at resonance is

Question # 2

The impedance of RLC series resonance circuit at resonant frequency is

Question # 3

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

Question # 4

Which of the following diode is used for the detection of light

Question # 5

SI unit of impedance is

Question # 6

The basic circuit element in A.C. circuits are:

Question # 7

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

Question # 8

A digital system deals with quantities or variables which have

Question # 9

The closed loop gain of the inverting amplifier is written as

Question # 10

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

Question # 11

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

Question # 12

Conversion of alternating current into direct current is called

Question # 13

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

Question # 14

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 15

The total reactance of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
2 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
3 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
4 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
7 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
8 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
9 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
10 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector

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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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