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 open loop gain of OP-AMP is of the order of

Question # 2

The power factor of resonant series circuit is

Question # 3

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

Question # 4

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

Question # 5

SI unit of impedance is

Question # 6

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

Question # 7

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

Question # 8

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 # 9

The closed loop gain of the inverting amplifier is written as

Question # 10

Transmitting antenna emits

Question # 11

Average value of A.C voltage during one cycle is

Question # 12

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

Question # 13

The RMS value of alternating current is:

Question # 14

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 15

At resonance, the impedance of RLC series circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
2 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
3 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
4 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
5 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
6 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
9 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
10 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode

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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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