ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

Name any four source of current.

Ans 1: Source of current are
1. Cells
2. Electric generators
3. Thermocouples
4. Solar cells

Question # 2

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 # 3

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

Ans 1: In case of light bulb,the temperature of the filament increase with the passage of current through it.Hence the Ohms law can't be applied to filament bulb.

Question # 4

What is the negative coefficient of temperature?

Ans 1: If the resistance of a substance decrease with an increase in temperature ,then it is termed as negative coefficient of temperature,For example ,silicon and germanium have negative coefficient of temperature.

Question # 5

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 # 6

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 # 7

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 # 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 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 # 10

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.

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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

Name any four source of current.

What is thermistor? Gives its two applications.

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

What is the negative coefficient of temperature?

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

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?

What is ohmic and non ohmic devices with example.

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

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

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

Name any four source of current.

What is thermistor? Gives its two applications.

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

What is the negative coefficient of temperature?

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

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?

What is ohmic and non ohmic devices with example.

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

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

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

Differentiate between conventional and non-conventional current.

Define resistivity and electrolysis.

What are non ohmic devices?Give two examples.

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

What is short circuit and open circuit mean to you?

State Ohm's law and basic principle of electroplating.

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

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 ?

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

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

Define Electromotive force and Terminal potential difference.

Name some effects of current.

Define resistivity and electrolysis.

What is meant by Tolerance? Also give one example.

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

What is meant by tolerance?

What is the negative coefficient of temperature?

State Ohm's law and basic principle of electroplating.

What is meant by tolerance of resistors?

Define temperature coefficient of resistivity.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

Share your comments & questions here

12th Class Physics
Short Questions Preparation