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, the phase angle for RLC series resonance circuit equals

Question # 2

The closed loop gain of the non-inverting amplifier is given by

Question # 3

The most common source of alternating voltage is:

Question # 4

In free space, the speed of electromagnetic waves is

Question # 5

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

Question # 6

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 7

Transmitting antenna emits

Question # 8

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 9

Conversion of alternating current into direct current is called

Question # 10

The bridge circuit of full wave rectification uses

Question # 11

Which of the following has a great concentration of impurity

Question # 12

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

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

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

Question # 15

In n-p-n transistor, emitter base junction is kept

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
2 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
3 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
4 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
5 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
8 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
9 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
10 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value

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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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