Lesson Electromagnet

Electromagnet

SIMILARITY BETWEEN ELECTRICITY AND MAGNETISM

•The charge objects and magnet both produce a force that pull or push without touching.

WAYS TO CHANGE THE STRENGTH OF AN ELECTROMAGNET

1. Add or remove coils of wire. The more coils an electromagnet has, the stronger it is.

2. The more current that is flowing, the stronger the electromagnet.

3. Small and week electromagnets work out of sight inside computer disk drives, video players, television screens, and other electronic devices.

USES OF MOTORS AND GENERATORS

1. Generators use electromagnets to produce current from motion.

2. Motors use electromagnets to produce motion from current.

CHECKING FOR UNDERSTANDING

•Explain the similarity between electricity and magnetism.

•State ways to change the strength of an electromagnets.

•State the uses of motors and generators.

CONCLUSION

•Wires, carrying an electric current becomes magnets.

•An electromagnetic is core wrapped with wires that carry current. The ends of the electromagnet’s coil are its poles.

•An electromagnet is magnetic only when there is a current in the wire.

• Generators use electromagnets to produce current from motion.

•Motors use electromagnets to produce motion from current.