| A | B |
|---|
| A current flowing through a conductor | creates a magnetic field around it. |
| Thermal effect | - current heats the conductor. |
| Lunimous effect | - current produces light. |
| Chemical effect | - current breaks a compound onto elements. |
| Breaking a compound into elements by a current | is called electrolysis. |
| Undesirable heat | has to be reduced. |
| Some appliences and machines | depend on the heating effect. |
| Chlorine is generated by | the electorlysis of salt water. |
| Light is produced | when a current ionizes a gas. |
| Mercury vapour lamps | give a greenish-blue light. |
| Electrolysis can be used to | break down water into hydrogen and oxygen. |
| Magnetic field | has three applications. |
| Electric relay works on the principle of | attracting megnetized materials to the conductor. |
| If the magnetic field is cut by another conductor | an electromotive force is exerted. |
| Electromotive force | is used in electromotors. |
| Principle of induction | is used in generators. |
