ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

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

Question # 2

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 3

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

Question # 4

For normal operation of transistor, the batteries

Question # 5

OP-AMP has the following input terminals

Question # 6

A diode characteristic curve is a plot between

Question # 7

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

Question # 8

The closed loop gain of the non-inverting amplifier is given by

Question # 9

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

Question # 10

The total reactance of a series RLC circuit at resonance is

Question # 11

At resonance frequency the impedance of parallel resonance circuit is

Question # 12

The basic circuit elements of A.C circuit are

Question # 13

The closed loop gain of the inverting amplifier is written as

Question # 14

Transmitting antenna emits

Question # 15

Average value of A.C voltage during one cycle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
2 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
3 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
4 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
5 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
6 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
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 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
9 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
10 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

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