ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

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

Question # 2

Alternating current is produced by a voltage source which polarity:

Question # 3

In half wave rectification

Question # 4

The closed loop gain of the non-inverting amplifier is given by

Question # 5

During each cycle, alternating voltage reaches a peak value

Question # 6

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

Question # 7

Conversion of alternating current into direct current is called

Question # 8

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 9

The alternative voltage of current is actually measured by:

Question # 10

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

Question # 11

A digital system deals with quantities or variables which have

Question # 12

SI unit of impedance is

Question # 13

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 14

Which one of the following is correct?

Question # 15

The entire wave form of sinusoidal voltage is actually a set of all the:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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)
3 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
4 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
5 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
6 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
7 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
8 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
9 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
10 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these

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