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

Question # 2

During the negative half-cycle of the half-wave rectification, the diode

Question # 3

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 4

The output voltage of half wave rectification is in the form of

Question # 5

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

Question # 6

The open loop gain of OP-AMP is of the order of

Question # 7

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

Question # 8

Alternating current can be transmitted:

Question # 9

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 10

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

Question # 11

At resonance frequency the impedance of parallel resonance circuit is

Question # 12

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 13

The value of the input resistance of OP-AMP is of the order of

Question # 14

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

Question # 15

Transmitting antenna emits

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
3 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
4 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
5 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
6 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
7 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
8 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
9 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
10 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

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