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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

Which of the following has a great concentration of impurity

Question # 6

Alternating current can be transmitted:

Question # 7

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

Question # 8

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 9

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 # 10

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

Question # 11

In describing functions of digital systems, a closed switch will be shown as

Question # 12

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

Question # 13

The value of the input resistance of OP-AMP is of the order of

Question # 14

The closed loop gain of the inverting amplifier is written as

Question # 15

Alternating current can induce voltage because it has a

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
2 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
3 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
4 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
5 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
6 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
7 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
8 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
9 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
10 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

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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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