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

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

Question # 2

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

Question # 3

Chock consumes externally small

Question # 4

In a transistor, the central region is called

Question # 5

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

Question # 6

The value of current gain of n-p-n transistor is of the order of

Question # 7

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

Question # 8

The impedance of RLC series resonance circuit at resonant frequency is

Question # 9

Alternating current can induce voltage because it has a

Question # 10

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 11

Transmitting antenna emits

Question # 12

The total reactance of a series RLC circuit at resonance is

Question # 13

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

Question # 14

OP-AMP has the following input terminals

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 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
2 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
3 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
4 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
5 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
6 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
7 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
8 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
9 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
10 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

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