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

For the normal operation of the transistor, its

Question # 2

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

Question # 3

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 4

The value of current gain of n-p-n transistor is of the order of

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

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

Question # 7

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

Question # 8

In which of the following components, pn-junction is used

Question # 9

For normal operation of transistor, the batteries

Question # 10

The bridge circuit of full wave rectification uses

Question # 11

The power factor of resonant series circuit is

Question # 12

The Instantaneous value of alternative current maybe:

Question # 13

The RMS value of alternating current is:

Question # 14

The open loop gain of OP-AMP is of the order of

Question # 15

When the p-n junction is forward biased its resistance is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
2 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
3 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
5 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
6 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
7 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
8 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
9 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
10 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

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