ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

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

Question # 2

During each cycle, alternating voltage reaches a peak value

Question # 3

For a n-p-n transistor, the conventional current equation can be written as

Question # 4

The input resistance of the OP-AMP is the resistance between the

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

A digital system deals with quantities or variables which have

Question # 7

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 8

At resonance, the impedance of RLC series circuit is

Question # 9

The closed loop gain of the inverting amplifier is written as

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Average value of A.C voltage during one cycle is

Question # 14

A changing magnetic flux creates around itself

Question # 15

When the p-n junction is forward biased its resistance is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
3 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)
4 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
5 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
6 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
7 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
8 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive

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