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

During each cycle, alternating voltage reaches a peak value

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

An A.C varies as a function of

Question # 6

The RMS value of alternating current is:

Question # 7

When the p-n junction is forward biased its resistance is of the order of

Question # 8

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 9

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

Question # 10

For the normal operation of the transistor, its

Question # 11

At resonance frequency the impedance of parallel resonance circuit is

Question # 12

The closed loop gain of the inverting amplifier is written as

Question # 13

Alternating current can be transmitted:

Question # 14

A P-N juction or semiconductor diode cannot be used as

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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°
2 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
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 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
5 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
6 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
7 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
8 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
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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