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

For normal operation of transistor, the batteries

Question # 2

Transmitting antenna emits

Question # 3

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

Question # 4

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

Question # 5

An A.C varies as a function of

Question # 6

The closed loop gain of the non-inverting amplifier is given by

Question # 7

In half wave rectification

Question # 8

The sum of positive and negative peak values is called:

Question # 9

Average value of A.C voltage during one cycle is

Question # 10

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 11

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 12

Which one of the following waves belongs to electromagnetic spectrum

Question # 13

The magnitude of alternative voltage V:

Question # 14

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
2 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
3 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
4 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
5 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
6 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
7 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
8 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
9 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
10 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms

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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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