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

Alternating current can induce voltage because it has a

Question # 3

Alternating current can be transmitted:

Question # 4

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

Question # 5

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 6

The amplifier which us used to perform mathematical operations electronically is known as

Question # 7

The average of A.C. current and voltage over a complete cycle is

Question # 8

The device which allows only the flow of an A.C. through a circuit is

Question # 9

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 # 10

The power factor of resonant series circuit is

Question # 11

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

Question # 12

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 # 13

The Instantaneous value of alternative current maybe:

Question # 14

During the positive half-cycle in the half-wave rectification,the diode

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
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 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
4 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
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
5 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
6 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
7 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
8 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
9 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
10 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply

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