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 bridge circuit of full wave rectification uses

Question # 2

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 3

In a transistor, the central region is called

Question # 4

A changing magnetic flux creates around itself

Question # 5

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 6

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

Question # 7

For the normal operation of the transistor, its

Question # 8

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

Question # 9

During each cycle, alternating voltage reaches a peak value

Question # 10

In RLC series circuit, resonance occurs when

Question # 11

Transmitting antenna emits

Question # 12

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

Question # 13

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

Question # 14

The value of current gain of n-p-n transistor is of the order of

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
2 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
3 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
4 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
5 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
6 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
7 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
8 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
9 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
10 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive

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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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