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

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

Question # 2

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 3

In free space, the speed of electromagnetic waves is

Question # 4

The total reactance of a series RLC circuit at resonance is

Question # 5

The bridge circuit of full wave rectification uses

Question # 6

In a transistor, the central region is called

Question # 7

The highest value reached by the voltage or current:

Question # 8

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 9

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 # 10

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

Question # 11

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 12

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

Question # 13

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

Question # 14

The waveform of alternating voltage is a:

Question # 15

The most common source of alternating voltage is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
2 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
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 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
5 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
6 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
7 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
8 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
9 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
10 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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