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

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

Ans 1: No current pass through the galvanometer when wheat stone bridge is balanced.Because at this stage ,both the terminals of the galvanometer are at the same potential.Hence no current will flow through it.

Question # 3

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 # 4

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 # 5

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 # 6

Does the bends in wire effect its electrical resistance?

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

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 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 # 9

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 # 10

State Ohm's law and write its formula.

Ans 1: It states that "the current flowing through a conductor is directly proportional to the applied potential difference provided that the physical state remains same"
V=IR
Resistance: The opposition against the flow of current is known as resistance.The SI unit of resistance is Ohm
R=V/I

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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.

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

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

What are non ohmic devices?Give two examples.

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

Does the bends in wire effect its electrical resistance?

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

What is ohmic and non ohmic devices with example.

What is meant by Tolerance? Also give one example.

State Ohm's law and write its formula.

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.

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

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

What are non ohmic devices?Give two examples.

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

Does the bends in wire effect its electrical resistance?

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

What is ohmic and non ohmic devices with example.

What is meant by Tolerance? Also give one example.

State Ohm's law and write its formula.

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

How can rheostat be used as potential divider?

State Ohm's law and basic principle of electroplating.

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

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

What is short circuit and open circuit mean to you?

Define resistivity and electrolysis.

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

What is ohmic and non ohmic devices with example.

Does the bends in wire effect its electrical resistance?

What is wheat stone bridge?

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

What is short circuit and open circuit mean to you?

Define temperature coefficient of resistivity.

What is ohmic and non ohmic devices with example.

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

Does the bends in wire effect its electrical resistance?

How can rheostat be used as potential divider?

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

What is thermistor? Gives its two applications.

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

What is wheat stone bridge?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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