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

Transmitting antenna emits

Question # 2

In n-p-n transistor, emitter base junction is kept

Question # 3

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 4

The power factor of resonant series circuit is

Question # 5

The alternative voltage of current is actually measured by:

Question # 6

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

Question # 7

SI unit of impedance is

Question # 8

Conversion of alternating current into direct current is called

Question # 9

A changing magnetic flux creates around itself

Question # 10

In a transistor, the central region is called

Question # 11

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

Question # 12

The amplifier which us used to perform mathematical operations electronically is known as

Question # 13

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

Question # 14

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

Question # 15

A resonance curve for RLC series circuit is a plot of frequency versus

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
2 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
3 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
4 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
5 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
6 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
7 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
8 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
9 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
10 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero

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