What is Electromagnetism? p.724

Electromagnetism The relationship between electricity and magnetism, where an electric current produces a magnetic field.

3 Characteristics of Magnetic Fields Produced by Electric Currents: The field can be turned on or off. Simply turn the current on or off. The field can have its direction reversed. Simply reverse the direction of the current. The field can have its strength changed. Simply add or take away loops/coils of wire.

Solenoid A coil of wire with a current, where the two ends act like magnetic poles.

What is an electromagnet? It is a solenoid with a ferromagnetic core. It is a strong magnet that can be turned on and off. An electromagnet’s strength can be increased by: Increasing the current in the solenoid Adding more loops of wire to the solenoid Winding the coils of the solenoid closer together Using a stronger ferromagnetic material for the core.

Common Electromagnets:

Summary Product Description: Suppose you are an inventor who just built a device that will lift heavy objects using an electromagnet. Write a description for your product brochure that explains how the magnet can move heavy objects.