ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

Does the bends in wire effect its electrical resistance?

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

Question # 4

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 # 5

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 # 6

Name some effects of current.

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

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

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 # 9

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 # 10

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.

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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

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

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

Does the bends in wire effect its electrical resistance?

What does the equation H=I2Rt show?

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

Name some effects of current.

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

What is the negative coefficient of temperature?

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

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

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

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

Does the bends in wire effect its electrical resistance?

What does the equation H=I2Rt show?

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

Name some effects of current.

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

What is the negative coefficient of temperature?

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

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

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

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

What is thermistor? Gives its two applications.

What is wheat stone bridge?

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?

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

What is meant by tolerance of resistors?

Does the bends in wire effect its electrical resistance?

What is ohmic and non ohmic devices with example.

State Ohm's law and write its formula.

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

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

Differentiate between conventional and non-conventional current.

How can rheostat be used as potential divider?

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

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

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

What is thermistor? Gives its two applications.

Write about any two sources of Current.

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

State Ohm's law and basic principle of electroplating.

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

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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12th Class Physics
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What does the equation H=I²Rt show?

What does the equation H=I²Rt show?