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 time interval during which the Voltage source changes its polarity once is known as:

Question # 2

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

Question # 3

The phase angle of a series RLC circuit at resonance is

Question # 4

For the normal operation of the transistor, its

Question # 5

The basic circuit elements of A.C circuit are

Question # 6

The closed loop gain of the inverting amplifier is written as

Question # 7

In half wave rectification

Question # 8

Electromagnetic waves transmit energy equal to

Question # 9

A changing magnetic flux creates around itself

Question # 10

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

Question # 11

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

Question # 12

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 13

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 14

In frequency modulation (FM), the carrier waves amplitude

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
2 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
3 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
4 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
5 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
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 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
8 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
9 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
10 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°

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