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

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

Question # 2

The length of rotating vector (on a certain scale) represents the:

Question # 3

Which of the following has a great concentration of impurity

Question # 4

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 5

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

Question # 6

The RMS value of alternating current is:

Question # 7

Which of the following diodes can operate in the reverse biased condition

Question # 8

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

Question # 9

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

Question # 10

In half wave rectification

Question # 11

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

Question # 12

In series RC circuit when R=Xc, then the phase angle is

Question # 13

A changing magnetic flux creates around itself

Question # 14

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

Question # 15

The bridge circuit of full wave rectification uses

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
2 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
3 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
4 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
5 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
6 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
7 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
8 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1

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