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 is correct?

Question # 2

The wave form of alternating voltage is the graph between:

Question # 3

The Instantaneous value of alternative current maybe:

Question # 4

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

Question # 5

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

Question # 6

Which of the following diodes can operate in the reverse biased condition

Question # 7

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 8

Conversion of alternating current into direct current is called

Question # 9

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 10

The sum of positive and negative peak values is called:

Question # 11

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

Question # 12

SI unit of impedance is

Question # 13

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

Question # 14

The total reactance of a series RLC circuit at resonance is

Question # 15

The time interval during which the Voltage source changes its polarity once is known as:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
4 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
5 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
6 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
7 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
8 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
9 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
10 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these

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