ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

A digital system deals with quantities or variables which have

Question # 3

Which of the following has a great concentration of impurity

Question # 4

For the normal operation of the transistor, its

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 7

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 8

Transmitting antenna emits

Question # 9

The amplifier which us used to perform mathematical operations electronically is known as

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The power factor of resonant series circuit is

Question # 14

The RMS value of alternating current is:

Question # 15

When the pn-junction is forward biased. the current flows through it is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
2 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
3 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
4 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
5 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
6 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
7 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
8 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
9 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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