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

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 # 2

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

Question # 3

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 4

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

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

The alternative voltage of current is actually measured by:

Question # 7

During the positive half-cycle in the half-wave rectification,the diode

Question # 8

The phase at the positive peak of an A.C. cycle is:

Question # 9

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

Question # 10

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 11

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

Question # 12

A diode characteristic curve is a plot between

Question # 13

In which of the following components, pn-junction is used

Question # 14

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
3 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
4 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
5 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
6 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
7 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
8 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
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these

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