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

At resonance frequency the impedance of parallel resonance circuit is

Question # 2

Chock consumes externally small

Question # 3

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

Question # 4

The wave form of alternating voltage is the graph between:

Question # 5

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 6

Electromagnetic waves transmit energy equal to

Question # 7

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 8

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

Question # 9

Average value of A.C voltage during one cycle is

Question # 10

Peak value of alternative current is:

Question # 11

The most common source of alternating voltage is:

Question # 12

The output voltage of half wave rectification is in the form of

Question # 13

The bridge circuit of full wave rectification uses

Question # 14

At resonance, the impedance of RLC series circuit is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
2 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
3 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
4 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
5 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
6 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
7 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
8 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
9 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
10 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these

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