Understanding Electricity Lesson 4 Magnetism

A substance called a ____ has the property of attracting magnetic materials.

How many kinds of poles do magnets have?

The law of magnetic force is that _____ poles attract each other and _____ poles ______ each other.

The force of gravity acts on objects that have _____.

All forces come in ____.

Every field has a ______ as well as a magnitude.

Every moving ______ produces a magnetic field.

The magnetic field is _____ when the charge is moving rapidly, and _____ when the charge is moving slowly.

In both left-hand rules, your thumb always points in the direction the _____ charges move.

The fingers of your left hand point in the direction of the ______.