ECAT Pre Engineering Physics Chapter 18 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 18 Electronics Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 18 Electronics Physics

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Physics ECAT Pre Engineering Chapter 18 Electronics Physics

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Question # 1

Electric field strength is defined as

Question # 2

In an N-type silicon, which of the following statement is true

Question # 3

Silicon is one of the mot commonly used:

Question # 4

The number of input terminals of an op-amp is:

Question # 5

Whenever a covalent bond breaks, it creates:

Question # 6

Conversion of A.C. into D.C. is called:

Question # 7

The intensity at a point due to a charge is inversely proportional to

Question # 8

In the forward biases situation, the current flowing across the p-n junction is a few:

Question # 9

The values 1 and 0 are designated as:

Question # 10

A digital system deals with quantities which has discrete values:

Question # 11

To designate the voltage as low or 0 by a logic gate, the specified minimum value is:

Question # 12

Truth table of logic function:

Question # 13

The number of LED'S needed to display all the digits is:

Question # 14

Majority charge carriers in the p-region of p-n junction are:

Question # 15

In AND gate, the output is 1 if:

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ECAT Physics Chapter 18 Important MCQ's

Sr.# Question Answer
1 .Depletion region contains:
A. Protons
B. Positive ions
C. Negative ions
D. Both (B) and (C)
2 By placing a dielectric in between the charges, the electrostatic force between them
A. Is always reduced
B. Is always increased
C. Is not affected
D. Is increased one million times
3 A diode which can turn its current ON and OFF in nono seconds is called:
A. LED
B. Photodiode
C. An ordinary diode.
D. Both (A) and (B)
4 In full wave rectification, simultaneous action is that:
A. Two diodes conduct and two do not.
B. One diode conduct and three do not.
C. Three diodes conduct and one does not.
D. All the four diodes conduct
5 The values 1 and 0 are designated as:
A. Continuous values
B. Binary values
C. Boolean values
D. Decimal values
6 A potential barrier of 0.7V exists across p-n junction made from:
A. Germanium
B. Silicon
C. Arsenic
D. Gallium
7 The SI unit of charge is
A. Ampere
B. Watt
C. Coulomb
D. Volt
8 The value of LDR depends upon intensity of:
A. Sound falling on it
B. Current passing through it
C. Magnetic field surrounding it
D. Light falling on it
9 An electronic computer is basically a vast arrangement of electronic switches which are made from
A. Resistors
B. Transistors
C. N -type crystals
D. P-Type crystals
10 A digital system deals with quantities which has discrete values:
A. Two in number
B. One in number
C. Three in number
D. Four in number

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