ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

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

Question # 3

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 4

In RLC series circuit, resonance occurs when

Question # 5

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

Question # 6

The most common source of alternating voltage is:

Question # 7

Which of the following has a great concentration of impurity

Question # 8

Alternating current can induce voltage because it has a

Question # 9

The closed loop gain of the inverting amplifier is written as

Question # 10

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

Question # 11

The alternative voltage of current is actually measured by:

Question # 12

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

Question # 13

Peak value of alternative current is:

Question # 14

The value of current gain of n-p-n transistor is of the order of

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
2 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
3 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
4 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
5 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
6 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
7 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
8 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
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 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

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