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

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

Question # 2

For a n-p-n transistor, the conventional current equation can be written as

Question # 3

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

Question # 4

The average of A.C. current and voltage over a complete cycle is

Question # 5

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

Question # 6

The phase angle of a series RLC circuit at resonance is

Question # 7

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

Question # 8

A digital system deals with quantities or variables which have

Question # 9

The highest value reached by the voltage or current:

Question # 10

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 11

The amplifier which us used to perform mathematical operations electronically is known as

Question # 12

Which of the following has a great concentration of impurity

Question # 13

The length of rotating vector (on a certain scale) represents the:

Question # 14

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 # 15

The waveform of alternating voltage is a:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
2 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
3 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
4 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
5 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
6 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
7 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
8 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
9 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
10 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above

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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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