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

For the normal operation of the transistor, its

Question # 2

Alternating current can induce voltage because it has a

Question # 3

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

Question # 4

The phase angle of a series RLC circuit at resonance is

Question # 5

A P-N juction or semiconductor diode cannot be used as

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Average value of A.C voltage during one cycle is

Question # 10

The basic circuit elements of A.C circuit are

Question # 11

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 12

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

Question # 13

The waveform of alternating voltage is a:

Question # 14

Which one of the following waves belongs to electromagnetic spectrum

Question # 15

The closed loop gain of the inverting amplifier is written as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
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 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)
5 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
6 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
7 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
8 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
9 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
10 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

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