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 basic circuit element in D.C. circuit is:

Question # 2

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

Question # 3

In a transistor, the central region is called

Question # 4

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 5

The basic circuit elements of A.C circuit are

Question # 6

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 7

The closed loop gain of the inverting amplifier is written as

Question # 8

The impedance of RLC series resonance circuit at resonant frequency is

Question # 9

The magnitude of alternative voltage V:

Question # 10

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 11

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

Question # 12

During the positive half-cycle in the half-wave rectification,the diode

Question # 13

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 14

Alternating current can be transmitted:

Question # 15

Conversion of alternating current into direct current is called

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
2 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
3 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
5 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
6 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
7 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
8 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
9 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
10 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass

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