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

At resonance frequency the impedance of parallel resonance circuit is

Question # 2

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

Question # 3

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

Question # 4

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 5

Which one of the following is correct?

Question # 6

The waveform of alternating voltage is a:

Question # 7

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 8

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

Question # 9

The phase angle of a series RLC circuit at resonance is

Question # 10

Alternating current can induce voltage because it has a

Question # 11

Average value of A.C voltage during one cycle is

Question # 12

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

Question # 13

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

Question # 14

Chock consumes externally small

Question # 15

If the value of C in a series RLC circuit is increased, the resonant frequency

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
2 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
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 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)
5 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
6 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
7 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
8 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
9 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
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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