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

Most OP-AMP operates with

Question # 2

The bridge circuit of full wave rectification uses

Question # 3

The length of rotating vector (on a certain scale) represents the:

Question # 4

For a n-p-n transistor, the conventional current equation can be written as

Question # 5

In a transistor, the central region is called

Question # 6

In n-p-n transistor, emitter base junction is kept

Question # 7

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

Question # 8

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

Question # 9

For the normal operation of the transistor, its

Question # 10

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 11

An A.C varies as a function of

Question # 12

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 13

In describing functions of digital systems, a closed switch will be shown as

Question # 14

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

Question # 15

Average value of A.C voltage during one cycle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 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
5 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
6 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
7 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
8 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
9 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
10 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value

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