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 basic circuit element in A.C. circuits are:

Question # 2

A changing magnetic flux creates around itself

Question # 3

The value of output resistance of OP-AMOP is of the order of

Question # 4

The phase angle of a series RLC circuit at resonance is

Question # 5

The time interval during which the Voltage source changes its polarity once is known as:

Question # 6

At resonance, the phase angle for RLC series resonance circuit equals

Question # 7

The device which allows only the flow of an A.C. through a circuit is

Question # 8

Chock consumes externally small

Question # 9

In half wave rectification

Question # 10

Alternating current can be transmitted:

Question # 11

In describing functions of digital systems, a closed switch will be shown as

Question # 12

Electromagnetic waves transmit energy equal to

Question # 13

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 14

The closed loop gain of the non-inverting amplifier is given by

Question # 15

The power factor of resonant series circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
2 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
3 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
4 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
5 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
6 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
7 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
8 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
9 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
10 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

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