ECAT Pre Engineering Physics Chapter 18 MCQ Test With Answer

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

When transistors are used in digital circuits they usually operate in the

Question # 2

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

Question # 3

Electric field strength is defined as

Question # 4

A hole in p-type my be due to:

Question # 5

A transistor has:

Question # 6

The values 1 and 0 are designated as:

Question # 7

Crystal of germanium or silicon in its pure form at absolute zero acts as:

Question # 8

If the distance between two charges is doubled, the force between them will become

Question # 9

The value of LDR depends upon intensity of:

Question # 10

A diode which can turn its current ON and OFF in nono seconds is called:

Question # 11

A potential barrier of 0.7 V exists across p-n junction made from:

Question # 12

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

Question # 13

Depletion region contains:

Question # 14

Improper biasing of a transistor circuit produces

Question # 15

Most of the electrons in the base of an NPN transistor flow

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ECAT Physics Chapter 18 Important MCQ's

Sr.# Question Answer
1 The SI unit of charge is
A. Ampere
B. Watt
C. Coulomb
D. Volt
2 Majority charge carriers in the p-region of p-n junction are:
A. electrons
B. positrons
C. Holes
D. Neutrons
3 The intensity at a point due to a charge is inversely proportional to
A. Amount of charge
B. Size of the charge
C. Distance between charge and the point
D. Square of the distance from the charge
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 A potential barrier of 0.7V exists across p-n junction made from:
A. Germanium
B. Silicon
C. Arsenic
D. Gallium
6 Crystal of germanium or silicon in its pure form at absolute zero acts as:
A. A conductor
B. A semiconductor
C. an insulator
D. Both (A) and (C)
7 A hole in p-type my be due to:
A. Trivalent impurity
B. Breking of some covalent bond
C. Pentavalent impurity
D. Germanium
8 Conversion of A.C. into D.C. is called:
A. Reftification
B. Amplification
C. Electric induction
D. Magnetic induction
9 Silicon is one of the mot commonly used:
A. onductor
B. Dielectric
C. Insulator
D. Semiconduction
10 Inverter is the name given to:
A. NOT gate
B. OR gate
C. NOR gate
D. AND gate

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