ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

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

Ans 1: Yes ,If the direction of current is same in two long parallel current carrying wires.Because the opposite pole of electromagnet comes in front of each other and attracts.

Question # 4

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% .

Question # 5

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 # 6

A voltmeter can not read the exact EMF of the cell.Why?

Ans 1: When a voltmeter is connected across a cell,it will draw some current from the cell and small potential drop takes place due current flowing through the internal resistance of the cell.As a result the actual emf of the cell decrease and the voltmeter cannot read exact value.

Question # 7

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 # 8

What is meant by tolerance?

Ans 1: Tolerance means the possible variation from the marked value.

Question # 9

What does the equation H=I²Rt show?

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

Question # 10

Define temperature coefficient of resistivity.

Ans 1: The temperature of coefficient of resistivity is defined as fractional change in resistivity per kelvin rise in temperature.Its unit is K^-1.

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

Define Electromotive force and Terminal potential difference.

What are non ohmic devices?Give two examples.

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

What is meant by Tolerance? Also give one example.

What is ohmic and non ohmic devices with example.

A voltmeter can not read the exact EMF of the cell.Why?

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

What is meant by tolerance?

What does the equation H=I2Rt show?

Define temperature coefficient of resistivity.

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

Define Electromotive force and Terminal potential difference.

What are non ohmic devices?Give two examples.

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

What is meant by Tolerance? Also give one example.

What is ohmic and non ohmic devices with example.

A voltmeter can not read the exact EMF of the cell.Why?

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

What is meant by tolerance?

What does the equation H=I2Rt show?

Define temperature coefficient of resistivity.

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

What is meant by tolerance?

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

Why does no current pass through Galvanometer in a balanced wheat stone bridge although the keys in the circuit are closed ?

What is thermistor? Gives its two applications.

What is wheat stone bridge?

How can rheostat be used as potential divider?

What does the equation H=I2Rt show?

Name some effects of current.

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

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

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

How a wheatstone bridge is used to determine an unknown resistance?

What does the equation H=I2Rt show?

Does the bends in wire effect its electrical resistance?

Define temperature coefficient of resistivity.

What is meant by Tolerance? Also give one example.

What is thermistor? Gives its two applications.

How can rheostat be used as potential divider?

What is short circuit and open circuit mean to you?

Differentiate between conventional and non-conventional current.

What are non ohmic devices?Give two examples.

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?

What does the equation H=I²Rt show?

What does the equation H=I²Rt show?

What does the equation H=I²Rt show?