ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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?

Ans 1: By decreasing the length and temperature of wire the value of resistance in the wire also decrease which cause an increase in the value of current,Hence the drift velocity of free electrons also increase.

Question # 2

What is meant by tolerance of resistors?

Ans 1: Tolerance is the measure of possible variation from the marked value,A gold band has +-5% tolerance ,silver has +-10% and no band at all wounf mean a +-20 tolerance.

Question # 3

What does the equation H=I²Rt show?

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

Question # 4

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 # 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

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 # 7

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 # 8

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 # 9

Does the bends in wire effect its electrical resistance?

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

Question # 10

State Ohm's law and basic principle of electroplating.

Ans 1: Current passing through a wire is directly proportional to the potential difference applied across its ends provided that the physical state conductors remains same.
Basic principle of electroplating is a process of coating a thin layer of sum expensive metal of (gold,silver etc) on a article of some cheap metal.

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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

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 meant by tolerance of resistors?

What does the equation H=I2Rt show?

What is thermistor? Gives its two applications.

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

What are non ohmic devices?Give two examples.

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

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

Does the bends in wire effect its electrical resistance?

State Ohm's law and basic principle of electroplating.

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

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 meant by tolerance of resistors?

What does the equation H=I2Rt show?

What is thermistor? Gives its two applications.

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

What are non ohmic devices?Give two examples.

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

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

Does the bends in wire effect its electrical resistance?

State Ohm's law and basic principle of electroplating.

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

Differentiate between conventional and non-conventional current.

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

Why potential meter is accurate measuring meter?

State Ohm's law and basic principle of electroplating.

What is meant by tolerance of resistors?

Define temperature coefficient of resistivity.

What is ohmic and non ohmic devices with example.

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

What is short circuit and open circuit mean to you?

Define Electromotive force and Terminal potential difference.

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

What is meant by Tolerance? Also give one example.

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

Define Electromotive force and Terminal potential difference.

What is meant by tolerance?

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

Name any four source of current.

What are non ohmic devices?Give two examples.

State Ohm's law and basic principle of electroplating.

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.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

12th Class Physics
Short Questions Preparation

What does the equation H=I²Rt show?

What does the equation H=I²Rt show?