Electric Force
What is the force between two electric charges called?
electric force
What are the two ends of a magnet called
North and south poles
Electromagnetism relates ________________ and ______________________.
electricity and magnetism
What does a galvanometer measure?
electric current
What are the three particles that make up an atom?
Proton, neutron, and electron
How can you increase the magnetic field of a coiled wire?
Add more coils, tighten coils, increase current
What is the flow of electric charge?
Electric current
This is the invisible area of force surrounding a magnet
Magnetic field
Electric current produces a _______________________
magnetic field
An electric motor transforms electric energy into this kind of energy.
mechanical energy
This is a positive charge.
proton
What does the prefix ferro- mean?
iron
What happens when a positive charge comes close to a negative charge?
Attract
This is what happens when two north poles come close to each other
Repel
What is one way to change the strength of a magnetic field around a straight wire?
Coil it, increase the current
True or false: An electric motor and a generator work in the reverse of one another
True
This is a negative charge
electron
What is the job of a step-up transformer?
increase the voltage
This is the buildup of charge in one spot
Static electricity
Attract
If something is ferromagnetic, it contains _________________
iron
What is the difference between direct and alternating current?
DC flows in one direction, AC can reverse its direction
When the number of protons and electrons are equal, an atom is _________________
neutral
Where on a magnetic is the magnetic field the strongest?
the north and south poles
This is direction that electric field lines point
To the positive
What are two reasons that the Earth is considered a giant magnet?
Magnetic field, north and south poles, iron core
What is the difference between a solenoid and an electromagnet?
an electromagnet has a ferromagnetic core
step-up and step-down
Where will you find the electrons in an atom?
outside the nucleus
Where on a solenoid is the magnetic field the strongest?
The center of the coil