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

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 2

The impedance of RLC series resonance circuit at resonant frequency is

Question # 3

Average value of A.C voltage during one cycle is

Question # 4

A diode characteristic curve is a plot between

Question # 5

A digital system deals with quantities or variables which have

Question # 6

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

Question # 7

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

Question # 8

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 9

The input resistance of the OP-AMP is the resistance between the

Question # 10

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

Question # 11

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

Question # 12

In half wave rectification

Question # 13

Peak value of alternative current is:

Question # 14

Most OP-AMP operates with

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
2 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
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 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
5 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
6 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
7 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
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 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
10 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)

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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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