ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

Differentiate between conventional and non-conventional current.

Ans 1: Conventional Current: The current flow die to positive charges from a point at higher potential to a point at lower potential is called conventional current.
Ans 2: Non-Conventional Current: The amount of electric charge that flow through a cross section of a conductor per unit time is known as electric current.It is also known as non-conventional current.

Question # 4

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 # 5

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 # 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

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 # 8

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

Ans 1: Wheatstone bridge is an especially designed electrically circuit used to calculate the accurate value of any unknown resistance.It consists of four resistance,a galvanometer, a battery and a switch connected.When the switch is closed current pas through the galvanometer and then the three known resistance R₁,R₂and R₃are adjusted in such a way that galvanometer show no deflection,In this balanced condition the fourth unknown resistance R₄can be calculated by using this relation.R₁/R₂=R₃/R₄.

Question # 9

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 # 10

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.

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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

Differentiate between resistance and resistivity.Give their unit.

What is meant by Tolerance? Also give one example.

Differentiate between conventional and non-conventional current.

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

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

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

How can rheostat be used as potential divider?

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

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

What are non ohmic devices?Give two examples.

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

Differentiate between resistance and resistivity.Give their unit.

What is meant by Tolerance? Also give one example.

Differentiate between conventional and non-conventional current.

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

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

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

How can rheostat be used as potential divider?

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

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

What are non ohmic devices?Give two examples.

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

Why potential meter is accurate measuring meter?

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?

Define temperature coefficient of resistivity.

Name some effects of current.

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

Define resistivity and electrolysis.

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

What is wheat stone bridge?

What is the negative coefficient of temperature?

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

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

State Ohm's law and write its formula.

What is wheat stone bridge?

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

Why potential meter is accurate measuring meter?

What are non ohmic devices?Give two examples.

What is short circuit and open circuit mean to you?

What is meant by Tolerance? Also give one example.

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 is the negative coefficient of temperature?

What is ohmic and non ohmic devices with example.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
Short Questions Preparation