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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

At resonance, the impedance of RLC series circuit is

Question # 7

The basic circuit element in A.C. circuits are:

Question # 8

For normal operation of transistor, the batteries

Question # 9

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

Question # 10

Which of the following has a great concentration of impurity

Question # 11

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 12

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

Question # 13

Most OP-AMP operates with

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
3 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
6 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
7 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
8 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
9 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
10 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs

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