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

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

Question # 2

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 # 3

Most OP-AMP operates with

Question # 4

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

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

Question # 7

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

Question # 8

For normal operation of transistor, the batteries

Question # 9

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 10

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

Question # 11

The impedance of RLC series resonance circuit at resonant frequency is

Question # 12

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

Question # 13

The open loop gain of OP-AMP is of the order of

Question # 14

Electromagnetic waves transmit energy equal to

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 emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
2 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
3 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
4 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
5 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
6 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
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
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
8 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
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 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them

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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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