7.1.4: Magnets and Electricity

If there are excess electrons on an object it gives that object a negative charge.

• True

• False

Static electricity is a build up of an electrical charge on the surface of an object.

• true

• false

For electricity to move/work it has to have a ________.

• field

• current

• form

We control electrical currents by creating _______, for which we use wires.

• loops

• currents

• circuits

• copper

A(n) __________ transfers electrical current easily, and a(n) __________ stops electrical current.

• Insulator, Conductor

• Conductor, current

• Insulator, charge

• Conductor, Insulator

Electromagnet – a magnet made from a current bearing coil of wire wrapped around a plastic core.

• True

• False

You can strengthen an Electromagnet by:

• Adding more current

• Adding more coils

• Disconnecting the current

• Tightening the coils

Increasing the distance between force fields ______ the strength.

• increases

• decreases

• maintains