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

Question # 2

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 3

The power factor of resonant series circuit is

Question # 4

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

Question # 5

The closed loop gain of the non-inverting amplifier is given by

Question # 6

Which one of the following is correct?

Question # 7

The basic circuit elements of A.C circuit are

Question # 8

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

Question # 9

SI unit of impedance is

Question # 10

An A.C varies as a function of

Question # 11

The RMS value of alternating current is:

Question # 12

In which of the following components, pn-junction is used

Question # 13

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

Question # 14

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 15

When the pn-junction is in reversed biased, current flows through the junction due to the

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
2 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
3 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
4 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
5 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
6 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
7 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
8 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
9 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
10 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1

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