Points to Remember, Glossary, Concept Map

Points to Remember

• Opposite charges attract each other and like charges repel each other.

• Charges can be transferred from one region to another region by any of the following ways: Transfer by friction, Transfer by conduction and Transfer by induction.

• Friction between objects results in transfer of electrons between them.

• When a charged body touches another body, charges can be transferred from one body to another.

• Induction is a process of charging an uncharged body by bringing a charged body near to it but not touching it.

• Electroscope is an instrument used to detect and measure electric charges.

• Earthing is the process of connecting the exposed metal parts of an electrical circuit to the ground.

• Lightning arrester is a device used to protect buildings from the effects of lightning.

• A simple circuit consists of four elements: a source of electricity (battery), a path or conductor through which electricity flows (wire), a switch to control the circuit and an electrical resistor (lamp) which is any device that requires electricity to operate.

• The decomposition of molecules of a solution into positive and negative ions on passing an electric current through it is called electrolysis.

• A fuse is a strip of alloy wire which is made of lead and tin with a very low melting point.

GLOSSARY

1. Battery A device that stores and produces electricity from chemical cells.

2. Circuit The path through which electric current flows.

3. Electric charge Basic property of matter carried by some elementary particles. Electric charge can be positive or negative.

4. Electric current Flow of electric charges through a material.

5. Electron A tiny particle which revolves around the nucleus of an atom. It has a

negative charge of electricity.

6. Electroscope A scientific instrument used to detect the presence of electric charges on a metal body.

7. Friction The resistance that one surface or object encounters when moving over another.

8. Fuse A strip of wire that melts and breaks an electric circuit if the current exceeds a safe level.

9. Volt Unit of electrical force or electric pressure.

10. Voltage An electromotive force that causes electrons to flow.

REFERENCE BOOKS

1. Concept of physics - HC Verma

2. A Text-Book on Static Electricity - Hobart Mason

3. Fun With Static Electricity - Joy Cowley

4. Frank New Certificate Physics. McMillan Publishers.

INTERNET RESOURCES

1. http://sciencenetlinks.com/lessons/static-electricity-2/

2. https://www.stem.org.uk/resources/ community/collection/13389/static-electricity

3. https://www.physicsclassroom.com/class/ estatics

Concept Map

ICT CORNER

Electricity

Through this activity you will learn the usage of electricity through Interactive games.

Step 1 Open the Browser and type the URL given below

Step 2 You will see lot of games which is related to Electricity

Step 3 Click the Electricity circuits activity (First activity), you will see the sub topics, like Electricity in home, Introduction to circuits etc. ..

Step 4 Select the sub topic and play the game. Likewise play all the games.

Browse in the link:

http://interactivesites.weebly.com/electricity-and-energy.html

*Pictures are indicative only