ICS Part 2 Physics Chapter 13 Short Questions Preparation

Question # 1

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 # 2

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 # 3

What are non ohmic devices?Give two examples.

Ans 1: Those devices which don't obey the Ohm's law are called non-ohmic devices.Their current-voltage graphic is not a straight line.For example ,filament bulb and semiconductor diodes.

Question # 4

Write about any two sources of Current.

Ans 1:
1. Electric generators convert mechanical energy into the electrical energy.
2. Solar cells convert sunlight directly into electrical energy.
3. Thermocouples convert heat energy into electrical energy.

Question # 5

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 # 6

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 # 7

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 # 8

Name any four source of current.

Ans 1: Source of current are
1. Cells
2. Electric generators
3. Thermocouples
4. Solar cells

Question # 9

State Ohm's law and basic principle of electroplating.

Ans 1: Current passing through a wire is directly proportional to the potential difference applied across its ends provided that the physical state conductors remains same.
Basic principle of electroplating is a process of coating a thin layer of sum expensive metal of (gold,silver etc) on a article of some cheap metal.

Question # 10

Does the bends in wire effect its electrical resistance?

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

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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

How can rheostat be used as potential divider?

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

What are non ohmic devices?Give two examples.

Write about any two sources of Current.

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

Define temperature coefficient of resistivity.

What is wheat stone bridge?

Name any four source of current.

State Ohm's law and basic principle of electroplating.

Does the bends in wire effect its electrical resistance?

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

How can rheostat be used as potential divider?

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

What are non ohmic devices?Give two examples.

Write about any two sources of Current.

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

Define temperature coefficient of resistivity.

What is wheat stone bridge?

Name any four source of current.

State Ohm's law and basic principle of electroplating.

Does the bends in wire effect its electrical resistance?

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

What is thermistor? Gives its two applications.

Name some effects of current.

State Ohm's law and basic principle of electroplating.

Define resistivity and electrolysis.

Differentiate between resistance and resistivity.Give their unit.

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?

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

What is wheat stone bridge?

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

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

Define resistivity and electrolysis.

Write about any two sources of Current.

Name some effects of current.

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

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

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

Differentiate between resistance and resistivity.Give their unit.

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

How can rheostat be used as potential divider?

What is short circuit and open circuit mean to you?

ICS Part 2 Physics Chapter 13 Short Questions Preparation

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