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

Electromagnetic waves transmit energy equal to

Question # 2

The waveform of alternating voltage is a:

Question # 3

Chock consumes externally small

Question # 4

At resonance, the impedance of RLC series circuit is

Question # 5

The highest value reached by the voltage or current:

Question # 6

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

Question # 7

The magnitude of alternative voltage V:

Question # 8

In free space, the speed of electromagnetic waves is

Question # 9

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

Question # 10

OP-AMP has the following input terminals

Question # 11

The value of the potential difference across the depletion region for the case of germanium is

Question # 12

The length of rotating vector (on a certain scale) represents the:

Question # 13

The power factor of resonant series circuit is

Question # 14

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

Question # 15

The value of output resistance of OP-AMOP is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
2 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
3 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
4 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
5 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
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 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
8 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
9 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
10 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

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