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

A diode characteristic curve is a plot between

Question # 2

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

Question # 3

A digital system deals with quantities or variables which have

Question # 4

For normal operation of transistor, the batteries

Question # 5

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

Question # 6

The power factor of resonant series circuit is

Question # 7

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

Question # 8

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 9

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

Question # 10

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 11

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

Question # 12

A changing magnetic flux creates around itself

Question # 13

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

Question # 14

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

Question # 15

The value of output resistance of OP-AMOP is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
2 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
3 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 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
6 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
7 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
8 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
9 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
10 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase

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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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