ICS Part 2 Physics Chapter 18 Short Questions Preparation

Question # 1

Give two applications of gated in control system.

Ans 1: Gates are widely used in control system.They control the function of the system by monitoring some physical parameters such as temperature ,pressure or some other physical quantity of the system,Sensors are required to operate gates.

Question # 2

Why the base current is transistor is very small?

Ans 1: Base is very thin so a number of electrons attracted by collector and very few enter into the base.And base current is very small.

Question # 3

What is meant by rectification?

Ans 1: The conversing of alternating current signal into pulsating direct current signal is called rectification.The current for this purpose is called rectifier circuit.

Question # 4

Define logic system and logic gates.

Ans 1: A digital system deals with the quantities or variable which have only two discrete values or state.
The electronic circuits which implements the various logic operation are known as logic gates.

Question # 5

Differentiate between the forward biased and the reserve biase.

Ans 1: When p side is positive and n-side is negative,the diode is forward biased.The width of depletion region reduces to which more current is allowed to flow across the junction.The forward resistance is few ohms.
Ans 2: When p side is negative and n side is positive,the diode is reserved biased.The width of depletion region is increased and a very small current flows across the junction due to flow of minority charges carriers,The resistance offered by the diode is several mega ohms.

Question # 6

Why charge carriers are not present in the depletion region?

Ans 1: This is due to the fact when an electron from an n region diffuses into the p-region,it leaves behind a positive ion.When this electron recombines with the hole in the p-region,a negative ion is formed,So no charge carrier are available in this region,though it contains immobile positive and negative ions.

Question # 7

What is AND Gate?

Ans 1: It is a logic gate that implements the truth table of AND operations.It has two or more input and single output.

Question # 8

Write a note on LED.

Ans 1: Light emitting diode are made from the special semiconductor such as gallium arsenide and gallium arsenide phosphide in which the potential barrier between p and n side is such that when electrons combines with a hole during forward biased conduction,a photon of visible light is emitted.
LED are used in 7-segment display,small light sources etc.

Question # 9

How is the XOR gate so called?

Ans 1: One of its most commonly used applications is as a basic logic comparator which produce a logic "1" output when its two inputs bits are not equal.Because of the ,the XOR gate has an inequality status being known as an odd functions.

Question # 10

What is photovoltaic cell?Discuss its working?

Ans 1: It consists of a thick n type region covered by a thin p-layer type.When exposed to light,it absorbs photon which generated electron-hole pairs.The electric field at the junction moves electron and holes and a current flow through the external circuit.And this current is directly proportional to the intensity of light.

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ICS Part 2 Physics Chapter 18 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 7 "ICS Part 2 Physics Chapter 18 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 18 Short Questions Preparation

Give two applications of gated in control system.

Why the base current is transistor is very small?

What is meant by rectification?

Define logic system and logic gates.

Differentiate between the forward biased and the reserve biase.

Why charge carriers are not present in the depletion region?

What is AND Gate?

Write a note on LED.

How is the XOR gate so called?

What is photovoltaic cell?Discuss its working?

Prepare Complete Set Wise Questions For Chapter 7 "ICS Part 2 Physics Chapter 18 Short Questions Preparation "

Set 1

Set 2

Set 3

ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 1

Give two applications of gated in control system.

Why the base current is transistor is very small?

What is meant by rectification?

Define logic system and logic gates.

Differentiate between the forward biased and the reserve biase.

Why charge carriers are not present in the depletion region?

What is AND Gate?

Write a note on LED.

How is the XOR gate so called?

What is photovoltaic cell?Discuss its working?

ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 2

Write a note on LED.

How is p-n junction formed?

What is AND Gate?

Why charge carriers are not present in the depletion region?

Why the base current is transistor is very small?

Give two applications of gated in control system.

What is photovoltaic cell?Discuss its working?

Define Open Loop gain of operational amplifier.

What do LED and LASER stand for?

Give four application or uses of photodiode?

ICS Part 2 Physics Chapter 18 Short Questions Preparation - Set 3

Give any two characteristics of operational amplifier.

What is the role of potential barrier in a diode?How it is formed in diode?

What is semiconductor diode?

How is p-n junction formed?

Why is the photodiode operated in reverse biased state?

Why the base current is transistor is very small?

What is principle of vital ground?

What is meant by rectification?

How is the XOR gate so called?

What is the net charge on a n-type or p-type substance?

ICS Part 2 Physics Chapter 18 Short Questions Preparation

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