ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

The closed loop gain of the non-inverting amplifier is given by

Question # 2

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

Question # 3

In n-p-n transistor, emitter base junction is kept

Question # 4

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

Question # 5

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

Question # 6

In half wave rectification

Question # 7

The time interval during which the Voltage source changes its polarity once is known as:

Question # 8

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

Question # 9

At resonance, the phase angle for RLC series resonance circuit equals

Question # 10

Alternating current is produced by a voltage source which polarity:

Question # 11

The closed loop gain of the inverting amplifier is written as

Question # 12

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 13

The waveform of alternating voltage is a:

Question # 14

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

Question # 15

The impedance of RLC series resonance circuit at resonant frequency is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
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 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
7 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
8 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
9 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
10 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°

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