ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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

Ans 1: Yes ,If the direction of current is same in two long parallel current carrying wires.Because the opposite pole of electromagnet comes in front of each other and attracts.

Question # 2

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 # 3

Why does no current pass through Galvanometer in a balanced wheat stone bridge although the keys in the circuit are closed ?

Ans 1: No current pass through the galvanometer when wheat stone bridge is balanced.Because at this stage ,both the terminals of the galvanometer are at the same potential.Hence no current will flow through it.

Question # 4

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 # 5

What is wheat stone bridge?

Ans 1: It is an electrical circuit which can be used to find the unknown resistance of a wire.It consists of four resistance connected in the form of mesh.galvanometer,battery and switch.

Question # 6

State Ohm's law and write its formula.

Ans 1: It states that "the current flowing through a conductor is directly proportional to the applied potential difference provided that the physical state remains same"
V=IR
Resistance: The opposition against the flow of current is known as resistance.The SI unit of resistance is Ohm
R=V/I

Question # 7

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 # 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

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 # 10

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

Ans 1: When a voltmeter is connected across a cell,it will draw some current from the cell and small potential drop takes place due current flowing through the internal resistance of the cell.As a result the actual emf of the cell decrease and the voltmeter cannot read exact value.

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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

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

What is meant by tolerance of resistors?

Why does no current pass through Galvanometer in a balanced wheat stone bridge although the keys in the circuit are closed ?

Define Electromotive force and Terminal potential difference.

What is wheat stone bridge?

State Ohm's law and write its formula.

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

What is ohmic and non ohmic devices with example.

Define temperature coefficient of resistivity.

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

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

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

What is meant by tolerance of resistors?

Why does no current pass through Galvanometer in a balanced wheat stone bridge although the keys in the circuit are closed ?

Define Electromotive force and Terminal potential difference.

What is wheat stone bridge?

State Ohm's law and write its formula.

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

What is ohmic and non ohmic devices with example.

Define temperature coefficient of resistivity.

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

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

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 meant by Tolerance? Also give one example.

Name some effects of current.

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

How can rheostat be used as potential divider?

What is meant by tolerance of resistors?

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

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

What is the negative coefficient of temperature?

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

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

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

Differentiate between resistance and resistivity.Give their unit.

What is wheat stone bridge?

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

State Ohm's law and write its formula.

What is thermistor? Gives its two applications.

How can rheostat be used as potential divider?

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

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

Define resistivity and electrolysis.

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
Short Questions Preparation