ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 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

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.

Question # 4

What is short circuit and open circuit mean to you?

Ans 1: when switched is close and current is passing through the circuit,It is called closed circuit and in this situation resistance is zero whereas the circuit is said to be open if it has infinite resistance and no current is passing through it.

Question # 5

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 # 6

Name some effects of current.

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

Question # 7

Define temperature coefficient of resistivity.

Ans 1: The temperature of coefficient of resistivity is defined as fractional change in resistivity per kelvin rise in temperature.Its unit is K^-1.

Question # 8

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 # 9

Does the bends in wire effect its electrical resistance?

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

Question # 10

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.

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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

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

What is meant by tolerance of resistors?

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

What is short circuit and open circuit mean to you?

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.

Define temperature coefficient of resistivity.

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

Does the bends in wire effect its electrical resistance?

What is thermistor? Gives its two applications.

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

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

What is meant by tolerance of resistors?

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

What is short circuit and open circuit mean to you?

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.

Define temperature coefficient of resistivity.

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

Does the bends in wire effect its electrical resistance?

What is thermistor? Gives its two applications.

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

Define Electromotive force and Terminal potential difference.

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

Differentiate between conventional and non-conventional current.

What is meant by tolerance of resistors?

What is thermistor? Gives its two applications.

What is meant by Tolerance? Also give one example.

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

State Ohm's law and write its formula.

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

What is ohmic and non ohmic devices with example.

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

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

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

Differentiate between conventional and non-conventional current.

Name some effects of current.

Why potential meter is accurate measuring meter?

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

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

Define temperature coefficient of resistivity.

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

What is wheat stone bridge?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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