ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

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 # 4

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.

Question # 5

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 # 6

Name some effects of current.

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

Question # 7

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 # 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

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 # 10

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.

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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

State Ohm's law and write its formula.

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

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

Differentiate between resistance and resistivity.Give their unit.

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

Name some effects of current.

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

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

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

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

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

State Ohm's law and write its formula.

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

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

Differentiate between resistance and resistivity.Give their unit.

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

Name some effects of current.

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

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

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

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

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

What is short circuit and open circuit mean to you?

What does the equation H=I2Rt show?

Name any four source of current.

State Ohm's law and write its formula.

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

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

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

Name some effects of current.

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

Define temperature coefficient of resistivity.

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

State Ohm's law and write its formula.

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

What is meant by tolerance of resistors?

What is meant by Tolerance? Also give one example.

Define resistivity and electrolysis.

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

Write about any two sources of Current.

Define Electromotive force and Terminal potential difference.

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?

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?