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

Chock consumes externally small

Question # 2

A digital system deals with quantities or variables which have

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

For the normal operation of the transistor, its

Question # 5

The alternative voltage of current is actually measured by:

Question # 6

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

Question # 7

The value of current gain of n-p-n transistor is of the order of

Question # 8

In describing functions of digital systems, a closed switch will be shown as

Question # 9

The RMS value of alternating current is:

Question # 10

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

Question # 11

A P-N juction or semiconductor diode cannot be used as

Question # 12

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

Question # 13

Alternating current is produced by a voltage source which polarity:

Question # 14

The basic circuit element in D.C. circuit is:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
2 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
3 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
4 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
5 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
6 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
7 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
8 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
9 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
10 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four

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