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

SI unit of impedance is

Question # 2

In RLC series circuit, resonance occurs when

Question # 3

The sum of positive and negative peak values is called:

Question # 4

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

Question # 5

The most common source of alternating voltage is:

Question # 6

The closed loop gain of the inverting amplifier is written as

Question # 7

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 # 8

The RMS value of alternating current is:

Question # 9

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

Question # 10

The highest value reached by the voltage or current:

Question # 11

In a transistor, the central region is called

Question # 12

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 13

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

Question # 14

The basic circuit elements of A.C circuit are

Question # 15

In series RC circuit when R=Xc, then the phase angle is

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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 amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
3 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
4 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
5 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
6 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
7 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
8 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
9 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
10 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)

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