ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

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 # 4

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 # 5

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 # 6

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 # 7

Name any four source of current.

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

Question # 8

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 # 9

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 # 10

Differentiate between resistance and resistivity.Give their unit.

Ans 1: Resistance: The opposition against the flow of current is known as resistance,The SI unit of resistance is Ohm.
R=V/I
Ans 2: Resistivity:The resistance of a meter cube of a material is called resistivity.Its unit is known as ohm-meter.

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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 are non ohmic devices?Give two examples.

What is the negative coefficient of temperature?

Define temperature coefficient of resistivity.

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

What is short circuit and open circuit mean to you?

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

Name any four source of current.

What does the equation H=I2Rt show?

Differentiate between conventional and non-conventional current.

Differentiate between resistance and resistivity.Give their unit.

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 are non ohmic devices?Give two examples.

What is the negative coefficient of temperature?

Define temperature coefficient of resistivity.

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

What is short circuit and open circuit mean to you?

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

Name any four source of current.

What does the equation H=I2Rt show?

Differentiate between conventional and non-conventional current.

Differentiate between resistance and resistivity.Give their unit.

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

What is the negative coefficient of temperature?

State Ohm's law and write its formula.

What is meant by Tolerance? Also give one example.

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

What is meant by tolerance?

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

What are non ohmic devices?Give two examples.

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

Does the bends in wire effect its electrical resistance?

Define resistivity and electrolysis.

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

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

What is meant by Tolerance? Also give one example.

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

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

Define temperature coefficient of resistivity.

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

Name some effects of current.

What is meant by tolerance of resistors?

What does the equation H=I2Rt show?

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

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?

What does the equation H=I²Rt show?