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 of the following diodes can operate in the reverse biased condition

Question # 2

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

Question # 3

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 4

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

Question # 5

During the positive half-cycle in the half-wave rectification,the diode

Question # 6

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

Question # 7

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

Question # 8

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 9

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

Question # 10

In free space, the speed of electromagnetic waves is

Question # 11

The device which allows only the flow of an A.C. through a circuit is

Question # 12

Transmitting antenna emits

Question # 13

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

Question # 14

The time interval during which the Voltage source changes its polarity once is known as:

Question # 15

In half wave rectification

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
2 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
3 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
4 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
5 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
6 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
7 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
8 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
9 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
10 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass

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