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 total reactance of a series RLC circuit at resonance is

Question # 2

SI unit of impedance is

Question # 3

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

Question # 4

In a transistor, the central region is called

Question # 5

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

Question # 6

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 7

The impedance of RLC series resonance circuit at resonant frequency is

Question # 8

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

Question # 9

In RLC series circuit, resonance occurs when

Question # 10

Peak value of alternative current is:

Question # 11

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

Question # 12

A diode characteristic curve is a plot between

Question # 13

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 14

Alternating current can be transmitted:

Question # 15

The sum of positive and negative peak values is called:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
2 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
3 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
4 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
5 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
6 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
7 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
8 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
9 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
10 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply

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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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