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 alternative voltage of current is actually measured by:

Question # 2

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

Question # 3

A diode characteristic curve is a plot between

Question # 4

The sum of positive and negative peak values is called:

Question # 5

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

Question # 6

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

Question # 7

OP-AMP has the following input terminals

Question # 8

The power factor of resonant series circuit is

Question # 9

Transmitting antenna emits

Question # 10

The closed loop gain of the inverting amplifier is written as

Question # 11

The basic circuit element in A.C. circuits are:

Question # 12

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 13

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

Question # 14

When the p-n junction is forward biased its resistance is of the order of

Question # 15

During each cycle, alternating voltage reaches a peak value

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
2 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
3 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
4 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
5 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
6 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
7 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
8 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
9 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
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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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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