ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 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

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 # 4

What is meant by tolerance?

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

Question # 5

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

Ans 1: By an increase in potential difference,drift velocity also increase.Because by increasing potential difference ,the current also increase .

Question # 6

Define Electromotive force and Terminal potential difference.

Ans 1: Electromotive force:The energy supplied to a unit charge in moving it from negative to positive electrode inside the source is called electromotive force.
Ans 2: Terminal potential difference:The potential difference across the terminal of a cell or battery when current is being drawn from it is called terminal potential difference.The potential difference across the conductor is zero when no current flows through it.

Question # 7

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 # 8

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 # 9

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.

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.

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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 ohmic and non ohmic devices with example.

What is thermistor? Gives its two applications.

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

What is meant by tolerance?

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

Define Electromotive force and Terminal potential difference.

What is meant by tolerance of resistors?

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

How can rheostat be used as potential divider?

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

What is ohmic and non ohmic devices with example.

What is thermistor? Gives its two applications.

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

What is meant by tolerance?

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

Define Electromotive force and Terminal potential difference.

What is meant by tolerance of resistors?

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

How can rheostat be used as potential divider?

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

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

Define resistivity and electrolysis.

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.

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

What is meant by tolerance?

What is the negative coefficient of temperature?

What is wheat stone bridge?

How can rheostat be used as potential divider?

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

Why potential meter is accurate measuring meter?

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

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

What does the equation H=I2Rt show?

Does the bends in wire effect its electrical resistance?

What is short circuit and open circuit mean to you?

Write about any two sources of Current.

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

Name some effects of current.

What is wheat stone bridge?

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

Define temperature coefficient of resistivity.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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What does the equation H=I²Rt show?