5th Magnet and Electricity

The magnetic effect of the electric current

1)The electric current can generate a magnetic field.

Activity To show the magnetic effect of the electric current.

Materials: small compass - an insulated wire - a dry battery

|Steps                                               |Figures                                         |Observation                                     |
|1. Put the insulated wire beside the compass which   |                                                 |1. The compass needle doesn't deflect.           |
|is put in four different positions                   |                                                 |                                                 |
|2. Connect the wire ends with the two poles of the   |                                                 |2. the compass needle deflects after flowing the|
|battery, then put the compass in four different     |                                                 |electric current through the wire.               |
|positions .                                         |                                                 |                                                 |


Inference:
• The electric current has a magnetic effect, where it generates a magnetic field.
• Generating the magnetic field by using the electric current is
  the idea of making the electromagnet .



The electromagnet

- It is the magnet which is made by electricity.
• Its structure :
- It is made up of a copper wire coiling (twisted) around a bar of
wrought (soft) iron connected to a battery.
* The idea of working :
- When the electric current passes through the wire, the bar of the wrought iron works as a magnet.
So : The electromagnet convert the electric energy into magnetic energy.
    - To prove that magnetism can be gained by electricity.
Activity
materials:
30 cm. of an insulated copper wire - a long wrought (soft) iron nail
- a dry battery - metal paper clips (or iron filings).

|Steps...