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

Question # 2

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

Question # 3

At resonance frequency the impedance of parallel resonance circuit is

Question # 4

In n-p-n transistor, emitter base junction is kept

Question # 5

The total reactance of a series RLC circuit at resonance is

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

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

Question # 8

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

Question # 9

Which of the following has a great concentration of impurity

Question # 10

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

Question # 11

In RLC series circuit, resonance occurs when

Question # 12

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

Question # 13

The basic circuit elements of A.C circuit are

Question # 14

The RMS value of alternating current is:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
3 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
4 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
5 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
6 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
7 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
8 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
9 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
10 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
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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