ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

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 # 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 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.

Question # 6

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 # 7

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 # 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

Name some effects of current.

Ans 1: Some effects are :
1. Heating effects
2. Magnetic effect
3. Chemical effect

Question # 10

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

Ans 1: As the temperature of the conductor rises,the amplitude of vibration of atoms increase and hence the probability of their collision with free electrons also increases which results in increase of resistance of conductor.

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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

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

Differentiate between conventional and non-conventional current.

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

What is meant by Tolerance? Also give one example.

What is wheat stone bridge?

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

What is ohmic and non ohmic devices with example.

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

Name some effects of current.

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

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

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

Differentiate between conventional and non-conventional current.

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

What is meant by Tolerance? Also give one example.

What is wheat stone bridge?

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

What is ohmic and non ohmic devices with example.

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

Name some effects of current.

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

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

State Ohm's law and basic principle of electroplating.

Name any four source of current.

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

Why potential meter is accurate measuring meter?

What is ohmic and non ohmic devices with example.

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

What is thermistor? Gives its two applications.

Define temperature coefficient of resistivity.

What is meant by tolerance of resistors?

Differentiate between conventional and non-conventional current.

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

Does the bends in wire effect its electrical resistance?

What is thermistor? Gives its two applications.

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

How can rheostat be used as potential divider?

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?

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

Name any four source of current.

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

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

State Ohm's law and basic principle of electroplating.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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