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

Alternating current is produced by a voltage source which polarity:

Question # 2

The power factor of resonant series circuit is

Question # 3

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

Question # 4

The sum of positive and negative peak values is called:

Question # 5

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 6

The magnitude of alternative voltage V:

Question # 7

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

Question # 8

Average value of A.C voltage during one cycle is

Question # 9

A diode characteristic curve is a plot between

Question # 10

During each cycle, alternating voltage reaches a peak value

Question # 11

Which of the following diode is used for the detection of light

Question # 12

Transmitting antenna emits

Question # 13

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

Question # 14

The RMS value of alternating current is:

Question # 15

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
2 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
3 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
4 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
5 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
6 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)
7 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
8 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
9 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
10 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

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