ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 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

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 # 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 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 # 7

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 # 8

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

Ans 1: Wheatstone bridge is an especially designed electrically circuit used to calculate the accurate value of any unknown resistance.It consists of four resistance,a galvanometer, a battery and a switch connected.When the switch is closed current pas through the galvanometer and then the three known resistance R₁,R₂and R₃are adjusted in such a way that galvanometer show no deflection,In this balanced condition the fourth unknown resistance R₄can be calculated by using this relation.R₁/R₂=R₃/R₄.

Question # 9

Name some effects of current.

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

Question # 10

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.

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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 negative coefficient of temperature?

What is short circuit and open circuit mean to you?

Define temperature coefficient of resistivity.

What are non ohmic devices?Give two examples.

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

What does the equation H=I2Rt show?

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

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

Name some effects of current.

What is ohmic and non ohmic devices with 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

What is the negative coefficient of temperature?

What is short circuit and open circuit mean to you?

Define temperature coefficient of resistivity.

What are non ohmic devices?Give two examples.

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

What does the equation H=I2Rt show?

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

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

Name some effects of current.

What is ohmic and non ohmic devices with example.

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

What is meant by Tolerance? Also give one example.

State Ohm's law and basic principle of electroplating.

What is short circuit and open circuit mean to you?

Define Electromotive force and Terminal potential difference.

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

Define temperature coefficient of resistivity.

What does the equation H=I2Rt show?

Does the bends in wire effect its electrical resistance?

Write about any two sources of Current.

Why potential meter is accurate measuring meter?

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

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

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

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

What is meant by tolerance of resistors?

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

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

Define Electromotive force and Terminal potential difference.

What is short circuit and open circuit mean to you?

What is ohmic and non ohmic devices with example.

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

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?