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 free space, the speed of electromagnetic waves is

Question # 2

A diode characteristic curve is a plot between

Question # 3

SI unit of impedance is

Question # 4

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

Question # 5

The length of rotating vector (on a certain scale) represents the:

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 10

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

Question # 11

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

Question # 12

The most common source of alternating voltage is:

Question # 13

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

Question # 14

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 15

In which of the following components, pn-junction is used

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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 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
3 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
4 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
5 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
6 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
7 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
8 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
9 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
10 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance

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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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