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

For the normal operation of the transistor, its

Question # 2

The phase angle of a series RLC circuit at resonance is

Question # 3

The RMS value of alternating current is:

Question # 4

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

Question # 5

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

Question # 6

Conversion of alternating current into direct current is called

Question # 7

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 8

Transmitting antenna emits

Question # 9

A digital system deals with quantities or variables which have

Question # 10

At resonance, the impedance of RLC series circuit is

Question # 11

The value of the input resistance of OP-AMP is of the order of

Question # 12

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

Question # 13

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 14

The closed loop gain of the inverting amplifier is written as

Question # 15

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

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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 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
3 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
4 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
5 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
6 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
7 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
8 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
9 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
10 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential

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