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

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

Question # 3

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

Question # 4

The open loop gain of OP-AMP is of the order of

Question # 5

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

Question # 6

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 7

During the negative half-cycle of the half-wave rectification, the diode

Question # 8

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 # 9

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

Question # 10

When the p-n junction is forward biased its resistance is of the order of

Question # 11

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 12

In free space, the speed of electromagnetic waves is

Question # 13

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

Question # 14

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 15

The total reactance of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
2 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
3 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
4 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
5 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
6 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
7 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
8 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
9 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
10 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these

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