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

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 2

The most common source of alternating voltage is:

Question # 3

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

Question # 4

The basic circuit elements of A.C circuit are

Question # 5

The power factor of resonant series circuit is

Question # 6

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

Question # 7

Chock consumes externally small

Question # 8

Peak value of alternative current is:

Question # 9

Alternating current is produced by a voltage source which polarity:

Question # 10

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

Question # 11

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 12

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 13

Conversion of alternating current into direct current is called

Question # 14

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

Question # 15

In an A.C circuit with resistor only, the current and voltage have a phase angle of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
2 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
3 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
4 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
5 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
6 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
7 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
8 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
9 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
10 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them

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