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

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 2

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

Question # 3

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

Question # 4

In half wave rectification

Question # 5

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

Question # 6

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

Question # 7

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 8

OP-AMP has the following input terminals

Question # 9

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

Question # 10

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

Question # 11

The RMS value of alternating current is:

Question # 12

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 13

In series RC circuit when R=Xc, then the phase angle is

Question # 14

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

Question # 15

The device which allows only the flow of an A.C. through a circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
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 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 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
5 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
6 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
7 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
8 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
9 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
10 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

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