ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

What are non ohmic devices?Give two examples.

Ans 1: Those devices which don't obey the Ohm's law are called non-ohmic devices.Their current-voltage graphic is not a straight line.For example ,filament bulb and semiconductor diodes.

Question # 2

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 # 3

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 # 4

How can rheostat be used as potential divider?

Ans 1: By adjusting the sliding contact resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit,And thus a rheostat can be used as potential divider.

Question # 5

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 # 6

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 # 7

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 # 8

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

Ans 1: The temperature coefficient of a resistance is defined as fractional change in resistance per kelvin rise in temperature.Its unit is K^-1.Substance like Ge and Si have negative temperature coefficient.

Question # 9

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

Ans 1: During their motion free electrons collide frequently with the atoms of metal,on each collision they transfer some of their kinetic energy to the atime with which they collide.And these collisions produce heating effect in the wire.

Question # 10

What is meant by Tolerance? Also give one example.

Ans 1: Tolerance mean the possible variation in the value of resistance of a carbon resistors from a marked value.In case of silver and gold ban its value is +-10% and +-5% .

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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

What are non ohmic devices?Give two examples.

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

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

How can rheostat be used as potential divider?

State Ohm's law and basic principle of electroplating.

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

What is meant by tolerance of resistors?

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

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

What is meant by Tolerance? Also give one example.

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

What are non ohmic devices?Give two examples.

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

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

How can rheostat be used as potential divider?

State Ohm's law and basic principle of electroplating.

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

What is meant by tolerance of resistors?

Give two substance having negative temperature coefficient.Also define the temperature coefficient.

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

What is meant by Tolerance? Also give one example.

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

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?

What does the equation H=I2Rt show?

Define Electromotive force and Terminal potential difference.

State Ohm's law and basic principle of electroplating.

Do two long and parallel current carrying wires attract each other?

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

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

Differentiate between conventional and non-conventional current.

Define temperature coefficient of resistivity.

Differentiate between resistance and resistivity.Give their unit.

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

Define Electromotive force and Terminal potential difference.

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

What is wheat stone bridge?

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

Differentiate between resistance and resistivity.Give their unit.

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

Define temperature coefficient of resistivity.

Write about any two sources of Current.

Define resistivity and electrolysis.

Name any four source of current.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

Share your comments & questions here

12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?