Some Basics
Atoms with a negative charge are attracted to atoms with a(n) ________________ charge.
What is positive?
The ___________________ around the electric charge that experiences force exerted by the electric charge.
What is an electric field?
The opposite poles will ____________ in a magnet.
What is attract?
A ___________________ number of loops makes an electromagnet weaker.
What is fewer?
What is positive; negative?
This force occurs when ions create attractive and repulsive forces.
What is electric?
These are electric charges that do not move through a current.
What is static electricity?
These are the the two types of magnetism.
What are temporary and permanent?
These are the two types of charges in electric and magnetic forces.
What are positive and negative?
This force occurs when there is an attractive and repulsive force between two poles.
What is magnetic?
When your hair stands on end, with each strand repelling the other, you are experiencing _______________________.
What is static electricity?
An electric force that is positive (+) moves INWARD or OUTWARD to/from the charge.
What is outward?
The further away from the magnet, the ____________ the magnetic field.
What is weaker?
By ______________ the number of loops, you will increase the strength of an electromagnet.
What is increasing?
This force only works by combining electric and magnetic.
What is electromagnetism?
Currents flowing through a wire are surrounded by a(n) _____________________.
What is a magnetic field?
Electrons flowing through wires from a - terminal to a + terminal it creates a(n) ___________.
What is a current?
When all ______________ spin in one direction, they create the invisible force of magnetism.
What are electrons?
____________________ exists when soft metal is placed next to a permanent magnet.
What is temporary magnetism?
Electric current is measured in _____________.
What are amperes?
__________ is to electricity as poles is to magnetism (think of the attract and repel points).
What are ions?
What is a cobalt, iron, or nickel?
DRAW: The magnetic field around a bar magnet.
Besides increasing the number of loops, another way to increase the strength of an electromagnet is to increase the ____________, or the battery power.
What is current?
Hard drives, speakers, MRI machines, electric buzzers, and transformers are examples of this device.
What is an electromagnet?