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

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 2

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

Question # 3

For a n-p-n transistor, the conventional current equation can be written as

Question # 4

The Instantaneous value of alternative current maybe:

Question # 5

In a transistor, the central region is called

Question # 6

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 7

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 8

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

Question # 9

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 10

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

Question # 11

The basic circuit element in D.C. circuit is:

Question # 12

The phase angle of a series RLC circuit at resonance is

Question # 13

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 14

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

Question # 15

OP-AMP has the following input terminals

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
3 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
4 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°
5 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
6 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
9 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
10 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5

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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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