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

Peak value of alternative current is:

Question # 2

For the normal operation of the transistor, its

Question # 3

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 4

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

Question # 5

During each cycle, alternating voltage reaches a peak value

Question # 6

An A.C varies as a function of

Question # 7

Conversion of alternating current into direct current is called

Question # 8

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 9

Alternating current is produced by a voltage source which polarity:

Question # 10

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

Question # 11

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 12

The Instantaneous value of alternative current maybe:

Question # 13

Alternating current can be transmitted:

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 bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
2 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
3 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
4 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 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
7 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
8 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
9 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
10 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states

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