ICS Part 2 Physics Chapter 18 Short Questions Preparation

Question # 1

What do LED and LASER stand for?

Ans 1: LED stands for light emitting diode..
Laser stands for light amplification stimulated emission radiation .

Question # 2

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 # 3

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 # 4

Give four application or uses of photodiode?

Ans 1: It is used as
1. Detection of both visible and invisible radiations.
2. Logic circuits
3. Automatic switching
4. Optical communication equipment

Question # 5

How the normal operation of transistor is achieved?

Ans 1: For the normal operation the base emitter junction of transistor is forward biased and collector base junction is reverse.
In a common emitter amplifier ,input signal is applied between base and emitter and output signal is taken across collector and emitter,Similarly emitter base junction is forward biased and collector base junction is reverse biased.

Question # 6

Define current of gain of a transistor

Ans 1: The ratio of output current to input current is called current gain of a transistor.The ratio of collector current to base current is called current gain of a transistor.

Question # 7

Give any two characteristics of operational amplifier.

Ans 1: Input Resistance: It is the resistance between the + and - input of the amplifier,Whose value is of the order of several mega ohms.
Output resistance:It is the resistance between the output terminal and ground.Its value is only a few ohms.

Question # 8

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 # 9

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 # 10

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.

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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

What do LED and LASER stand for?

What is meant by rectification?

Differentiate between the forward biased and the reserve biase.

Give four application or uses of photodiode?

How the normal operation of transistor is achieved?

Define current of gain of a transistor

Give any two characteristics of operational amplifier.

Why the base current is transistor is very small?

Define logic system and logic gates.

How is the XOR gate so called?

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

What do LED and LASER stand for?

What is meant by rectification?

Differentiate between the forward biased and the reserve biase.

Give four application or uses of photodiode?

How the normal operation of transistor is achieved?

Define current of gain of a transistor

Give any two characteristics of operational amplifier.

Why the base current is transistor is very small?

Define logic system and logic gates.

How is the XOR gate so called?

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

Why the biasing requirement of the junction of a transistor for its normal operation?

How the normal operation of transistor is achieved?

What do LED and LASER stand for?

How is p-n junction formed?

What is OP-GATE?

Give four application or uses of photodiode?

How the current flows in forward and reverse biased diode?

What is photodiode?Write down its two main applications.

What is AND Gate?

How is the XOR gate so called?

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

Why the biasing requirement of the junction of a transistor for its normal operation?

How is the XOR gate so called?

Why is the photodiode operated in reverse biased state?

Define Depletion region?

Give any two characteristics of operational amplifier.

What is principle of vital ground?

Give two applications of gated in control system.

What is photovoltaic cell?Discuss its working?

Explain why an ordinary Silicon diode does not emit light.

What is meant by rectification?

ICS Part 2 Physics Chapter 18 Short Questions Preparation

12th Class Physics
Short Questions Preparation