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

Conversion of alternating current into direct current is called

Question # 2

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

Question # 3

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 4

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

Question # 5

SI unit of impedance is

Question # 6

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 7

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

Question # 8

Alternating current is produced by a voltage source which polarity:

Question # 9

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

Question # 10

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 11

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

Question # 12

A digital system deals with quantities or variables which have

Question # 13

The impedance of RLC series resonance circuit at resonant frequency is

Question # 14

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

Question # 15

In frequency modulation (FM), the carrier waves amplitude

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
2 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
3 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
4 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
5 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
6 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
7 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
8 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
9 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
10 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

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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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