ICS Part 2 Physics Chapter 18 Short Questions Preparation

Question # 1

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 # 2

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 # 3

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 # 4

Define Depletion region?

Ans 1: A region in a semiconductor device,usually at the junction of p-type and n-type materials ,in which there is neither an excess of electrons nor of holes is called depletion region,It charge less region.

Question # 5

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 # 6

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

Ans 1: Since they are electrically neutral substance,So the net charge on them is zero.

Question # 7

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 # 8

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.

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

Give any two characteristics of operational amplifier.

Differentiate between the forward biased and the reserve biase.

How is the XOR gate so called?

Define Depletion region?

How is p-n junction formed?

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

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

What is photovoltaic cell?Discuss its working?

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

Give any two characteristics of operational amplifier.

Differentiate between the forward biased and the reserve biase.

How is the XOR gate so called?

Define Depletion region?

How is p-n junction formed?

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

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

What is photovoltaic cell?Discuss its working?

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

How is the XOR gate so called?

Define Depletion region?

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

Why is the photodiode operated in reverse biased state?

Define logic system and logic gates.

What is AND Gate?

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

Give four application or uses of photodiode?

What is principle of vital ground?

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

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

Define logic system and logic gates.

What is principle of vital ground?

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

Why charge carriers are not present in the depletion region?

What is photodiode?Write down its two main applications.

The anode of a diode is 0.2V positive with respect to the cathode,It it forward biased?

What is AND Gate?

How the current flows in forward and reverse biased diode?

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

What is semiconductor diode?

ICS Part 2 Physics Chapter 18 Short Questions Preparation

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