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

Transmitting antenna emits

Question # 2

The sum of positive and negative peak values is called:

Question # 3

The phase angle of a series RLC circuit at resonance is

Question # 4

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

Question # 5

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

Question # 6

The power factor of resonant series circuit is

Question # 7

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

Question # 8

The basic circuit element in D.C. circuit is:

Question # 9

Alternating current can be transmitted:

Question # 10

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 11

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

Question # 12

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

Question # 13

In a transistor, the central region is called

Question # 14

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

Question # 15

For normal operation of transistor, the batteries

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
2 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
3 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
4 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°
5 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
6 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
7 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
8 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
9 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
10 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive

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