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

Question # 2

OP-AMP has the following input terminals

Question # 3

In describing functions of digital systems, a closed switch will be shown as

Question # 4

The basic circuit elements of A.C circuit are

Question # 5

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

Question # 6

For the normal operation of the transistor, its

Question # 7

For normal operation of transistor, the batteries

Question # 8

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

Question # 9

The Instantaneous value of alternative current maybe:

Question # 10

Which one of the following waves belongs to electromagnetic spectrum

Question # 11

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

Question # 12

A digital system deals with quantities or variables which have

Question # 13

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

Question # 14

The magnitude of alternative voltage V:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
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 describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
7 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
8 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
9 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
10 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

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