ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

Briefly describe the current through a metallic conductor and drift velocity.

Ans 1: In a metallic conductor,free electron are in random motion with the speed of several hundred km/s at the room temperature.If the ends of the wire are connected to the battery the free electrons are experience a force and directed to move in the electric field direction.The accelerating electrons keep on colliding with atoms of the conductors and transfer their energy to the lattice with the result that the electrons acquire an average velocity called drift velocity.The drift velocity is of the order of 10^-3.A steady current is establish in the wire.

Question # 2

What is the conventional current? How does it differs from electric current?

Ans 1: The current flow due to positive charges from a point at higher potential to a point at lower potential is called conventional current.It is due to positive charges while electric current is due to negative charges i.e electrons.

Question # 3

State Ohm's law and basic principle of electroplating.

Ans 1: Current passing through a wire is directly proportional to the potential difference applied across its ends provided that the physical state conductors remains same.
Basic principle of electroplating is a process of coating a thin layer of sum expensive metal of (gold,silver etc) on a article of some cheap metal.

Question # 4

What is ohmic and non ohmic devices with example.

Ans 1: The devices which obey Ohm's law are called ohmic devices and devices which do not obey Ohm's law are called non-ohmic law.For example copper,silver and gold are ohmic whereas diodes and tungsten filaments are non ohmic.

Question # 5

What is meant by tolerance of resistors?

Ans 1: Tolerance is the measure of possible variation from the marked value,A gold band has +-5% tolerance ,silver has +-10% and no band at all wounf mean a +-20 tolerance.

Question # 6

What are the difficulties in testing weather the filament of lighted bulb obeys ohm's law?

Ans 1: In case of light bulb,the temperature of the filament increase with the passage of current through it.Hence the Ohms law can't be applied to filament bulb.

Question # 7

What is wheat stone bridge?

Ans 1: It is an electrical circuit which can be used to find the unknown resistance of a wire.It consists of four resistance connected in the form of mesh.galvanometer,battery and switch.

Question # 8

Define Electromotive force and Terminal potential difference.

Ans 1: Electromotive force:The energy supplied to a unit charge in moving it from negative to positive electrode inside the source is called electromotive force.
Ans 2: Terminal potential difference:The potential difference across the terminal of a cell or battery when current is being drawn from it is called terminal potential difference.The potential difference across the conductor is zero when no current flows through it.

Question # 9

What is the effect on drift velocity of free electrons by increasing potential difference?

Ans 1: By an increase in potential difference,drift velocity also increase.Because by increasing potential difference ,the current also increase .

Question # 10

Does the bends in wire effect its electrical resistance?

Ans 1: No bend in wire do not affect its electrical resistance.

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ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 2 "ICS Part 2 Physics Chapter 13 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 13 Short Questions Preparation

Briefly describe the current through a metallic conductor and drift velocity.

What is the conventional current? How does it differs from electric current?

State Ohm's law and basic principle of electroplating.

What is ohmic and non ohmic devices with example.

What is meant by tolerance of resistors?

What are the difficulties in testing weather the filament of lighted bulb obeys ohm's law?

What is wheat stone bridge?

Define Electromotive force and Terminal potential difference.

What is the effect on drift velocity of free electrons by increasing potential difference?

Does the bends in wire effect its electrical resistance?

Prepare Complete Set Wise Questions For Chapter 2 "ICS Part 2 Physics Chapter 13 Short Questions Preparation "

Set 1

Set 2

Set 3

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 1

Briefly describe the current through a metallic conductor and drift velocity.

What is the conventional current? How does it differs from electric current?

State Ohm's law and basic principle of electroplating.

What is ohmic and non ohmic devices with example.

What is meant by tolerance of resistors?

What are the difficulties in testing weather the filament of lighted bulb obeys ohm's law?

What is wheat stone bridge?

Define Electromotive force and Terminal potential difference.

What is the effect on drift velocity of free electrons by increasing potential difference?

Does the bends in wire effect its electrical resistance?

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 2

What are non ohmic devices?Give two examples.

Differentiate between resistance and resistivity.Give their unit.

Briefly describe the current through a metallic conductor and drift velocity.

What is the conventional current? How does it differs from electric current?

How can rheostat be used as potential divider?

What is meant by tolerance of resistors?

A potential difference is applied across the ends of a copper wire,What is the effect on the drift velocity of free electrons by decreasing the length and temperature of the wire?

Why does the resistance of a conductor rise with a temperature?

Why potential meter is accurate measuring meter?

Does the bends in wire effect its electrical resistance?

ICS Part 2 Physics Chapter 13 Short Questions Preparation - Set 3

Why potential meter is accurate measuring meter?

What is meant by tolerance?

What is ohmic and non ohmic devices with example.

Does the bends in wire effect its electrical resistance?

What is the conventional current? How does it differs from electric current?

Define temperature coefficient of resistivity.

How the heating effects produce when current flows through the conductor?

Name any four source of current.

What is meant by tolerance of resistors?

Define resistivity and electrolysis.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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