ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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

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ECAT Physics 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

The basic circuit elements of A.C circuit are

Question # 3

The total reactance of a series RLC circuit at resonance is

Question # 4

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

Question # 5

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 6

The phase at the positive peak of an A.C. cycle is:

Question # 7

In free space, the speed of electromagnetic waves is

Question # 8

The basic circuit element in D.C. circuit is:

Question # 9

Alternating current can be transmitted:

Question # 10

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 # 11

Alternating current can induce voltage because it has a

Question # 12

The average of A.C. current and voltage over a complete cycle is

Question # 13

For normal operation of transistor, the batteries

Question # 14

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

Question # 15

For the normal operation of the transistor, its

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
2 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
3 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)
4 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
5 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
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 the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
8 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
9 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
10 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

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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