ICS Part 2 Physics Chapter 18 Short Questions Preparation

Question # 1

What is the potential barrier?What is the value of potential barrier of SI and Ge?

Ans 1: The potential difference across the depletion region which acts as a barrier to the flow of charge carriers is called potential barrier.The value of potential barrier for germanium is 0.3V and for silicon is 0.7 V.

Question # 2

How is p-n junction formed?

Ans 1: A p-n junction is formed when a crystal of germanium or silicon is grown in such a way that is its one half is doped with a trivalent impurity and the other half with a pentavalent impurity.

Question # 3

What is the effect of forward biased and reverse biasing of a diode on the width of depletion region?

Ans 1: When forward biased then the width of depletion region decreases and when reverse biased then the width of depletion region increase.

Question # 4

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

Ans 1: For the normal operation the base emitter junction of transistor is forward biased and collector base junction is reverse biased.

Question # 5

Why is the photodiode operated in reverse biased state?

Ans 1: Photodiode is used for the detection of light.So it is used in reverse biased state.Reverse current increase with the intensity of incident light.When no light incidents,then reverse current will be negligible.

Question # 6

What is semiconductor diode?

Ans 1: p-n junction is called semiconductor diode.

Question # 7

Define Open Loop gain of operational amplifier.

Ans 1: The ratio of output voltage to voltage difference between non -inverting and inverting inputs ,when there is no external connection between the input and output is called open loop gain of operational amplifier.

Question # 8

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 # 9

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 # 10

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.

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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 is the potential barrier?What is the value of potential barrier of SI and Ge?

How is p-n junction formed?

What is the effect of forward biased and reverse biasing of a diode on the width of depletion region?

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

Why is the photodiode operated in reverse biased state?

What is semiconductor diode?

Define Open Loop gain of operational amplifier.

Differentiate between the forward biased and the reserve biase.

How the normal operation of transistor is achieved?

Define logic system and logic gates.

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 is the potential barrier?What is the value of potential barrier of SI and Ge?

How is p-n junction formed?

What is the effect of forward biased and reverse biasing of a diode on the width of depletion region?

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

Why is the photodiode operated in reverse biased state?

What is semiconductor diode?

Define Open Loop gain of operational amplifier.

Differentiate between the forward biased and the reserve biase.

How the normal operation of transistor is achieved?

Define logic system and logic gates.

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

Explain why an ordinary Silicon diode does not emit light.

What is semiconductor diode?

How the current flows in forward and reverse biased diode?

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

Differentiate between the forward biased and the reserve biase.

What do LED and LASER stand for?

What is meant by rectification?

Define Open Loop gain of operational amplifier.

Why the base current is transistor is very small?

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

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

What is the potential barrier?What is the value of potential barrier of SI and Ge?

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

Define logic system and logic gates.

How does the motion of an electron in n type substance differ from the motion of holes in a p type substance?

What is principle of vital ground?

Write a note on LED.

Give four application or uses of photodiode?

Why is the photodiode operated in reverse biased state?

How the current flows in forward and reverse biased diode?

How is p-n junction formed?

ICS Part 2 Physics Chapter 18 Short Questions Preparation

12th Class Physics
Short Questions Preparation