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

The value of the potential difference across the depletion region for the case of germanium is

Question # 2

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

Question # 3

Alternating current can be transmitted:

Question # 4

The waveform of alternating voltage is a:

Question # 5

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

Question # 6

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

Question # 7

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 8

An A.C varies as a function of

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Alternating current can induce voltage because it has a

Question # 14

Transmitting antenna emits

Question # 15

When the pn-junction is in reversed biased, current flows through the junction due to the

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
3 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
4 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
5 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
6 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
7 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
8 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
9 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
10 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
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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