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 output resistance of OP-AMOP is of the order of

Question # 2

For a n-p-n transistor, the conventional current equation can be written as

Question # 3

Conversion of alternating current into direct current is called

Question # 4

The input resistance of the OP-AMP is the resistance between the

Question # 5

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 6

A changing magnetic flux creates around itself

Question # 7

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

Question # 8

The phase angle of a series RLC circuit at resonance is

Question # 9

Electromagnetic waves transmit energy equal to

Question # 10

The power factor of resonant series circuit is

Question # 11

The most common source of alternating voltage is:

Question # 12

A diode characteristic curve is a plot between

Question # 13

The closed loop gain of the inverting amplifier is written as

Question # 14

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 15

At resonance frequency the impedance of parallel resonance circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
3 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
4 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
5 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
6 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
7 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
8 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
9 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
10 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them

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