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 waveform of alternating voltage is a:

Question # 2

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

Question # 3

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 4

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

Question # 5

The time interval during which the Voltage source changes its polarity once is known as:

Question # 6

The sum of positive and negative peak values is called:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

At resonance, the impedance of RLC series circuit is

Question # 11

In free space, the speed of electromagnetic waves is

Question # 12

A changing magnetic flux creates around itself

Question # 13

The bridge circuit of full wave rectification uses

Question # 14

During each cycle, alternating voltage reaches a peak value

Question # 15

A digital system deals with quantities or variables which have

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
3 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
4 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
5 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
6 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
7 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
8 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
9 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
10 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

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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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