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 most common source of alternating voltage is:

Question # 2

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The closed loop gain of the inverting amplifier is written as

Question # 8

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

Question # 9

The impedance of RLC series resonance circuit at resonant frequency is

Question # 10

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

Question # 11

The magnitude of alternative voltage V:

Question # 12

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 13

The value of the input resistance of OP-AMP is of the order of

Question # 14

The amplifier which us used to perform mathematical operations electronically is known as

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
2 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
3 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
4 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
5 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
6 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
7 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
8 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
9 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
10 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms

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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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