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

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 2

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

Question # 3

Transmitting antenna emits

Question # 4

The magnitude of alternative voltage V:

Question # 5

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

Question # 6

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 7

A P-N juction or semiconductor diode cannot be used as

Question # 8

In free space, the speed of electromagnetic waves is

Question # 9

In series RC circuit when R=Xc, then the phase angle is

Question # 10

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

Question # 11

The waveform of alternating voltage is a:

Question # 12

The basic circuit element in A.C. circuits are:

Question # 13

A changing magnetic flux creates around itself

Question # 14

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

Question # 15

Conversion of alternating current into direct current is called

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
2 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
3 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
4 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
5 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
6 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
7 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
8 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
9 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
10 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none 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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