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

In RLC series circuit, resonance occurs when

Question # 2

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

Question # 3

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

Question # 4

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 5

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

Question # 6

The bridge circuit of full wave rectification uses

Question # 7

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

Question # 8

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

Question # 9

The average of A.C. current and voltage over a complete cycle is

Question # 10

Alternating current is produced by a voltage source which polarity:

Question # 11

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 12

Alternating current can be transmitted:

Question # 13

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
2 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
3 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
4 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
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 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
7 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
8 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
9 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
10 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above

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