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

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

Question # 2

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 3

Average value of A.C voltage during one cycle is

Question # 4

In free space, the speed of electromagnetic waves is

Question # 5

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 6

The input resistance of the OP-AMP is the resistance between the

Question # 7

Alternating current is produced by a voltage source which polarity:

Question # 8

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

Question # 9

In frequency modulation (FM), the carrier waves amplitude

Question # 10

The waveform of alternating voltage is a:

Question # 11

The phase angle of a series RLC circuit at resonance is

Question # 12

The basic circuit element in D.C. circuit is:

Question # 13

The power factor of resonant series circuit is

Question # 14

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

Question # 15

The Instantaneous value of alternative current maybe:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
2 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
3 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
4 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
5 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
6 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
7 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
8 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
9 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
10 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

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