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

Conversion of alternating current into direct current is called

Question # 2

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

Question # 3

The highest value reached by the voltage or current:

Question # 4

The wave form of alternating voltage is the graph between:

Question # 5

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

Question # 6

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 7

The sum of positive and negative peak values is called:

Question # 8

For normal operation of transistor, the batteries

Question # 9

Which of the following diodes can operate in the reverse biased condition

Question # 10

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

Question # 11

The phase at the positive peak of an A.C. cycle is:

Question # 12

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

Question # 13

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

Question # 14

Which one of the following is correct?

Question # 15

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
2 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
3 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
4 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
5 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
6 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
7 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
8 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these

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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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