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

Question # 2

The highest value reached by the voltage or current:

Question # 3

In half wave rectification

Question # 4

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 5

For the normal operation of the transistor, its

Question # 6

Conversion of alternating current into direct current is called

Question # 7

The basic circuit element in A.C. circuits are:

Question # 8

The wave form of alternating voltage is the graph between:

Question # 9

The phase at the positive peak of an A.C. cycle is:

Question # 10

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 11

In frequency modulation (FM), the carrier waves amplitude

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

In RLC series circuit, resonance occurs when

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
2 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
3 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
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 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
6 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°
7 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
8 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
9 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
10 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

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