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 bridge circuit of full wave rectification uses

Question # 2

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

Question # 3

The value of the input resistance of OP-AMP is of the order of

Question # 4

The total reactance of a series RLC circuit at resonance is

Question # 5

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

Question # 6

Conversion of alternating current into direct current is called

Question # 7

An A.C varies as a function of

Question # 8

For the normal operation of the transistor, its

Question # 9

Electromagnetic waves transmit energy equal to

Question # 10

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

Question # 11

SI unit of impedance is

Question # 12

Alternating current can be transmitted:

Question # 13

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 14

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

Question # 15

In RLC series circuit, resonance occurs when

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
2 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
3 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
4 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
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
7 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
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 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
10 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these

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