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

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

Question # 2

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 3

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

Question # 4

In which of the following components, pn-junction is used

Question # 5

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

Question # 6

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 # 7

The output voltage of half wave rectification is in the form of

Question # 8

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 9

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

Question # 10

The basic circuit element in D.C. circuit is:

Question # 11

At resonance frequency the impedance of parallel resonance circuit is

Question # 12

In RLC series circuit, resonance occurs when

Question # 13

An A.C varies as a function of

Question # 14

Alternating current can be transmitted:

Question # 15

The bridge circuit of full wave rectification uses

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
2 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
3 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
4 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
5 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
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 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
8 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
9 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°
10 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

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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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