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 sum of positive and negative peak values is called:

Question # 2

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 3

At resonance, the phase angle for RLC series resonance circuit equals

Question # 4

In RLC series circuit, resonance occurs when

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Peak value of alternative current is:

Question # 9

The amplifier which us used to perform mathematical operations electronically is known as

Question # 10

SI unit of impedance is

Question # 11

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 12

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

Question # 13

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 # 14

The alternative voltage of current is actually measured by:

Question # 15

The power factor of resonant series circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
2 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
3 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
4 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
5 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
6 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
7 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
8 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
9 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
10 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current

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