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

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 2

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 3

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

Question # 4

The value of current gain of n-p-n transistor is of the order of

Question # 5

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

Question # 6

Alternating current can induce voltage because it has a

Question # 7

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

Question # 8

The phase angle of a series RLC circuit at resonance is

Question # 9

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

Question # 10

During each cycle, alternating voltage reaches a peak value

Question # 11

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 12

In RLC series circuit, resonance occurs when

Question # 13

The impedance of RLC series resonance circuit at resonant frequency is

Question # 14

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

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 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
2 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
3 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
4 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
5 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
6 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
7 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
8 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
9 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
10 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. 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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