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 RMS value of alternating current is:

Question # 2

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

Question # 3

The basic circuit elements of A.C circuit are

Question # 4

SI unit of impedance is

Question # 5

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

Question # 6

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 7

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

Question # 8

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

Question # 9

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 10

Most OP-AMP operates with

Question # 11

The total reactance of a series RLC circuit at resonance is

Question # 12

An A.C varies as a function of

Question # 13

Chock consumes externally small

Question # 14

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

Question # 15

In a transistor, if the central region is p-type then this type of transistor is known as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
2 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
3 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
4 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
5 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
6 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
7 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
8 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
9 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
10 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value

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