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 phase angle of a series RLC circuit at resonance is

Question # 2

A diode characteristic curve is a plot between

Question # 3

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

Question # 4

In which of the following components, pn-junction is used

Question # 5

During each cycle, alternating voltage reaches a peak value

Question # 6

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 7

At resonance frequency the impedance of parallel resonance circuit is

Question # 8

Which of the following diode is used for the detection of light

Question # 9

A digital system deals with quantities or variables which have

Question # 10

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

Question # 11

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 12

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 13

Alternating current is produced by a voltage source which polarity:

Question # 14

In half wave rectification

Question # 15

During the negative half-cycle of the half-wave rectification, the diode

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
2 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
3 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
4 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
5 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
6 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
7 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
8 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
9 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
10 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2

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