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

Alternating current is produced by a voltage source which polarity:

Question # 2

At resonance, the phase angle for RLC series resonance circuit equals

Question # 3

Which of the following diodes can operate in the reverse biased condition

Question # 4

The basic circuit elements of A.C circuit are

Question # 5

Average value of A.C voltage during one cycle is

Question # 6

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 7

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

Question # 8

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

Question # 9

During the positive half-cycle in the half-wave rectification,the diode

Question # 10

Electromagnetic waves transmit energy equal to

Question # 11

The impedance of RLC series resonance circuit at resonant frequency is

Question # 12

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 13

At resonance frequency the impedance of parallel resonance circuit is

Question # 14

In describing functions of digital systems, a closed switch will be shown as

Question # 15

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
2 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
3 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
4 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
5 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
6 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
7 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
8 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
9 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
10 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf

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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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