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 power factor of resonant series circuit is

Question # 2

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

Question # 3

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 # 4

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 5

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

Question # 6

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

Question # 7

Which one of the following is correct?

Question # 8

For the normal operation of the transistor, its

Question # 9

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 10

Electromagnetic waves transmit energy equal to

Question # 11

The alternative voltage of current is actually measured by:

Question # 12

The magnitude of alternative voltage V:

Question # 13

Alternating current can be transmitted:

Question # 14

Which one of the following waves belongs to electromagnetic spectrum

Question # 15

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
2 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
3 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
4 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
5 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
6 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
7 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
8 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
9 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
10 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
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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