ElectricityInvestigation 4: Current Attractions

Klang

is a coil of wire, usually wound around a core of iron or steel, which

produces a magnetic field when electricity flows through the wire.

Electromagnet Rivet

The magnetism produced by an electromagnet can be turned on and off.

Small Washers

A Coil is wire wound repeatedly around a

central core.

A magnet can be made by winding an insulated wire around an iron core and running current through the wire.

A Core is the material around which

a coil is wound.

A prediction is an educated guess based on knowledge or information.

A graph is a way to display the relationship

between variables.

What can produce a Stronger Electromagnet?

Assuming that all the coils are wound in the same direction...

1) More winds produce a stronger electromagnet

2) Tighter winds produce a stronger electromagnet

3) Thicker wire produces a stronger electromagnet

4) Adding a D-cell in a SERIES circuit

Note: Adding a D-cell in a parallel circuit DOES NOT make a stronger electromagnet.