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

Which one of the following is correct?

Question # 2

In a transistor, the central region is called

Question # 3

When the p-n junction is forward biased its resistance is of the order of

Question # 4

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

Question # 5

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 6

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

Question # 7

Peak value of alternative current is:

Question # 8

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 9

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

Question # 10

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

Question # 11

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 12

The bridge circuit of full wave rectification uses

Question # 13

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 14

In frequency modulation (FM), the carrier waves amplitude

Question # 15

In free space, the speed of electromagnetic waves is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
2 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
3 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
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 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
6 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
7 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
8 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
9 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
10 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2

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