ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

What is meant by tolerance?

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

Question # 4

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 # 5

Does the bends in wire effect its electrical resistance?

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

Question # 6

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 # 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

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

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

Question # 10

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% .

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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

Write about any two sources of Current.

How can rheostat be used as potential divider?

What is meant by tolerance?

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

Does the bends in wire effect its electrical resistance?

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.

What is ohmic and non ohmic devices with example.

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

What is meant by Tolerance? Also give one example.

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

Write about any two sources of Current.

How can rheostat be used as potential divider?

What is meant by tolerance?

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

Does the bends in wire effect its electrical resistance?

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.

What is ohmic and non ohmic devices with example.

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

What is meant by Tolerance? Also give one example.

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

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

State Ohm's law and basic principle of electroplating.

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

What is meant by tolerance of resistors?

Name any four source of current.

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

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?

Name some effects of current.

What does the equation H=I2Rt show?

What is thermistor? Gives its two applications.

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

State Ohm's law and basic principle of electroplating.

What is thermistor? Gives its two applications.

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

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?

Differentiate between conventional and non-conventional current.

What does the equation H=I2Rt show?

What is short circuit and open circuit mean to you?

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

What is ohmic and non ohmic devices with example.

Differentiate between resistance and resistivity.Give their unit.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?

What does the equation H=I²Rt show?