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

Transmitting antenna emits

Question # 2

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

Question # 3

During the negative half-cycle of the half-wave rectification, the diode

Question # 4

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

Question # 5

The input resistance of the OP-AMP is the resistance between the

Question # 6

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

Question # 7

At resonance frequency the impedance of parallel resonance circuit is

Question # 8

In a transistor, the central region is called

Question # 9

A digital system deals with quantities or variables which have

Question # 10

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

Question # 11

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 12

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

Question # 13

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 14

In describing functions of digital systems, a closed switch will be shown as

Question # 15

The Instantaneous value of alternative current maybe:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
2 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
3 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
4 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
5 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)
6 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
7 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
8 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
9 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
10 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC

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