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 average of A.C. current and voltage over a complete cycle is

Question # 2

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

Question # 3

For normal operation of transistor, the batteries

Question # 4

The magnitude of alternative voltage V:

Question # 5

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

Question # 6

Alternating current can induce voltage because it has a

Question # 7

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

Question # 8

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

Question # 9

In which of the following components, pn-junction is used

Question # 10

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 11

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 12

Peak value of alternative current is:

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
3 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
4 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
5 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
6 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
7 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
8 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
9 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
10 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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