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

Most OP-AMP operates with

Question # 2

The sum of positive and negative peak values is called:

Question # 3

Chock consumes externally small

Question # 4

A P-N juction or semiconductor diode cannot be used as

Question # 5

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 6

A digital system deals with quantities or variables which have

Question # 7

The total reactance of a series RLC circuit at resonance is

Question # 8

In RLC series circuit, resonance occurs when

Question # 9

Conversion of alternating current into direct current is called

Question # 10

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 11

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 12

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 13

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

Question # 14

The Instantaneous value of alternative current maybe:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
3 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
4 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
5 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
6 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
7 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
8 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
9 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
10 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field

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