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 output voltage of half wave rectification is in the form of

Question # 2

In frequency modulation (FM), the carrier waves amplitude

Question # 3

For normal operation of transistor, the batteries

Question # 4

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

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

OP-AMP has the following input terminals

Question # 7

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

Question # 8

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 9

Which one of the following waves belongs to electromagnetic spectrum

Question # 10

Average value of A.C voltage during one cycle is

Question # 11

Chock consumes externally small

Question # 12

The basic circuit elements of A.C circuit are

Question # 13

At resonance, the phase angle for RLC series resonance circuit equals

Question # 14

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

Question # 15

A changing magnetic flux creates around itself

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
2 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
3 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
4 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
5 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
6 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
9 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
10 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms

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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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