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

Question # 2

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

Question # 3

Average value of A.C voltage during one cycle is

Question # 4

The open loop gain of OP-AMP is of the order of

Question # 5

The waveform of alternating voltage is a:

Question # 6

The magnitude of alternative voltage V:

Question # 7

A changing magnetic flux creates around itself

Question # 8

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

Question # 9

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

Question # 10

For the normal operation of the transistor, its

Question # 11

The output voltage of half wave rectification is in the form of

Question # 12

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

Question # 13

In RLC series circuit, resonance occurs when

Question # 14

Conversion of alternating current into direct current is called

Question # 15

Most OP-AMP operates with

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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°
2 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
3 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
4 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
5 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
6 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
7 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
8 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
9 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
10 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate

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