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

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 2

Chock consumes externally small

Question # 3

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

Question # 4

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 5

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

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

Alternating current can be transmitted:

Question # 8

The closed loop gain of the inverting amplifier is written as

Question # 9

In n-p-n transistor, emitter base junction is kept

Question # 10

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

Question # 11

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 12

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

Question # 13

In half wave rectification

Question # 14

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 15

An A.C varies as a function of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
4 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
5 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
6 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
7 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
8 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
9 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
10 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

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