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

The average of A.C. current and voltage over a complete cycle is

Question # 2

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

The magnitude of alternative voltage V:

Question # 7

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

Question # 8

The phase at the positive peak of an A.C. cycle is:

Question # 9

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 10

Which of the following diodes can operate in the reverse biased condition

Question # 11

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 12

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

Question # 13

Peak value of alternative current is:

Question # 14

The bridge circuit of full wave rectification uses

Question # 15

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
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 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
4 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
5 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
6 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
7 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
8 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
9 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
10 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero

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