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

Differentiate between resistance and resistivity.Give their unit.

Ans 1: Resistance: The opposition against the flow of current is known as resistance,The SI unit of resistance is Ohm.
R=V/I
Ans 2: Resistivity:The resistance of a meter cube of a material is called resistivity.Its unit is known as ohm-meter.

Question # 3

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 # 4

Define resistivity and electrolysis.

Ans 1: The resistance of a meter cube of a material is called resistivity.Certain liquids such dilute sulphuric acid or copper sulphate solution conduct electricity due to some chemical reactions that take place within them.The study of this process is known as electrolysis.

Question # 5

Does the bends in wire effect its electrical resistance?

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

Question # 6

Name any four source of current.

Ans 1: Source of current are
1. Cells
2. Electric generators
3. Thermocouples
4. Solar cells

Question # 7

What is thermistor? Gives its two applications.

Ans 1: Thermistors are heat sensitive resistors.Thermistors with positive temperature coefficient of resistance as well as negative temperature coefficient of resistance are available.They are used for accurate measuring of temperature up to 10K.They are used as temperature sensors.

Question # 8

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 # 9

Write about any two sources of Current.

Ans 1:
1. Electric generators convert mechanical energy into the electrical energy.
2. Solar cells convert sunlight directly into electrical energy.
3. Thermocouples convert heat energy into electrical energy.

Question # 10

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.

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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.

Differentiate between resistance and resistivity.Give their unit.

How can rheostat be used as potential divider?

Define resistivity and electrolysis.

Does the bends in wire effect its electrical resistance?

Name any four source of current.

What is thermistor? Gives its two applications.

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

Write about any two sources of Current.

What is wheat stone bridge?

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.

Differentiate between resistance and resistivity.Give their unit.

How can rheostat be used as potential divider?

Define resistivity and electrolysis.

Does the bends in wire effect its electrical resistance?

Name any four source of current.

What is thermistor? Gives its two applications.

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

Write about any two sources of Current.

What is wheat stone bridge?

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

Define Electromotive force and Terminal potential difference.

Why potential meter is accurate measuring meter?

What is meant by tolerance of resistors?

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

Does the bends in wire effect its electrical resistance?

What is meant by tolerance?

Differentiate between conventional and non-conventional current.

Name some effects of current.

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

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?

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

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

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

What does the equation H=I2Rt show?

What is meant by Tolerance? Also give one example.

Name some effects of current.

What is thermistor? Gives its two applications.

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

What is meant by tolerance of resistors?

What is short circuit and open circuit mean to you?

Differentiate between conventional and non-conventional current.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?