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

During each cycle, alternating voltage reaches a peak value

Question # 2

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 3

SI unit of impedance is

Question # 4

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

Question # 5

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 6

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

Question # 7

An A.C varies as a function of

Question # 8

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 9

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

Question # 10

The amplifier which us used to perform mathematical operations electronically is known as

Question # 11

In RLC series circuit, resonance occurs when

Question # 12

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

Question # 13

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 14

During the negative half-cycle of the half-wave rectification, the diode

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
3 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
4 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
5 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
6 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
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 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
9 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
10 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field

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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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