ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

Why potential meter is accurate measuring meter?

Ans 1: The voltage measured using potentiometer is the voltage across the terminal of the cell when current is not following through it.This voltage is exactly the emf of the cell.Further the accuracy of a potentiometer can be increased to a great extent by increasing the length of the "potentiometer wire".

Question # 2

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 # 3

Does the bends in wire effect its electrical resistance?

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

Question # 4

Name some effects of current.

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

Question # 5

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 # 6

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 # 7

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 # 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

What is meant by tolerance?

Ans 1: Tolerance means the possible variation from the marked value.

Question # 10

How can rheostat be used as potential divider?

Ans 1: By adjusting the sliding contact resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit,And thus a rheostat can be used as potential divider.

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

Why potential meter is accurate measuring meter?

What is ohmic and non ohmic devices with example.

Does the bends in wire effect its electrical resistance?

Name some effects of current.

Define temperature coefficient of resistivity.

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

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

What is meant by tolerance?

How can rheostat be used as potential divider?

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

Why potential meter is accurate measuring meter?

What is ohmic and non ohmic devices with example.

Does the bends in wire effect its electrical resistance?

Name some effects of current.

Define temperature coefficient of resistivity.

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

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

What is meant by tolerance?

How can rheostat be used as potential divider?

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

What is the negative coefficient of temperature?

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

What is thermistor? Gives its two applications.

Differentiate between resistance and resistivity.Give their unit.

Name any four source of current.

Does the bends in wire effect its electrical resistance?

State Ohm's law and write its formula.

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

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

How can rheostat be used as potential divider?

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

Why potential meter is accurate measuring meter?

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

What is short circuit and open circuit mean to you?

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

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

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

What is the negative coefficient of temperature?

What is meant by Tolerance? Also give one example.

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

ICS Part 2 Physics Chapter 13 Short Questions Preparation

Is this page helpful?

12th Class Physics
Short Questions Preparation