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

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

Question # 2

The basic circuit elements of A.C circuit are

Question # 3

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

Question # 4

The value of the potential difference across the depletion region for the case of germanium is

Question # 5

The value of the input resistance of OP-AMP is of the order of

Question # 6

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

Question # 7

A changing magnetic flux creates around itself

Question # 8

During the negative half-cycle of the half-wave rectification, the diode

Question # 9

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

Question # 10

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

Question # 11

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 12

In free space, the speed of electromagnetic waves is

Question # 13

Which of the following diode is used for the detection of light

Question # 14

In a transistor, the central region is called

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 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
3 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
4 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
5 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°
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
8 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
9 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
10 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization

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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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