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

Question # 2

Chock consumes externally small

Question # 3

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 4

Peak value of alternative current is:

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

At resonance frequency the impedance of parallel resonance circuit is

Question # 7

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

Question # 8

A changing magnetic flux creates around itself

Question # 9

In half wave rectification

Question # 10

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

Question # 11

Conversion of alternating current into direct current is called

Question # 12

The device which allows only the flow of an A.C. through a circuit is

Question # 13

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 14

The highest value reached by the voltage or current:

Question # 15

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
5 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
6 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
7 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
8 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
9 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
10 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms

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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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