A magnetic field is a force field created by
Arrows are close together on a force field when the force is
A compass needle shows us the magnetic field of
Earth has a magnetic field that is similar to a bar magnet's magnetic field.
Earth's magnetic South Pole is near Earth's geographic North Pole
Electronic devices create magnetic fields because they
A compass needle points north because of Earth's magnetic field unless
How can you test to see if there is a current running through a wire?
The compass needles are turned by magnetic forces caused by electric current. The magnetic forces caused by an electric current are one kind of
The electromagnetic forces from a current carrying wire are strong enough to move the compass needle. The forces can be made stronger by
An electromagnet is a magnet that
Refrigerator magnets and bar magnets are what type of magnet?
What THREE ways are electromagnets different from permanent magnets?
Electromagnets are useful in industry such as a junk yard because they
Permanent Magnets and Electromagnets are similar in which TWO ways?
A force that can act at a distance is called