Magnets and Magnetism
When two magnets' north poles are brought close together, they do this.
What is repel?
In magnetic forces, opposite poles do what?
What is attract?
True or False: A lightbulb in a circuit will not turn on if the circuit has a break in it.
What is True?
the study of the interaction between electricity and magnetism
What is electromagnetism
What is the name for a coil of wire?
What is a solenoid?
True or False: Magnets can attract all metals.
What is False?
When you touch a metal object after walking on carpet, you feel this small jolt caused by static electricity.
What is a shock?
This is the part of a circuit that provides energy to make electricity flow.
What is a battery (or power source)?
A magnet created using electricity. It is made by wrapping wire around a metal core (often iron) and running electric current through the wire
What is an electromagnet
Name one way to make an electromagnet stronger?
Add more coils, increase the electricity, use a stronger iron core
Forces between two same-sized magnets become stronger when this happens.
What is when the magnets are closer together
Static electricity happens when objects gain or lose these tiny particles.
What is electrons?
The magnetic field of an electromagnet comes from this flowing through the wire.
What is electric current?
True or False? All magnets are electromagnets
false
A material that attracts iron, nickel or cobalt.
What is a magnet
This object protects buildings from lightning strikes by safely directing the charge into the ground.
What is a lightening rod?
An object with more electrons than protons has this type of charge.
What is negative?
Unlike permanent magnets, electromagnets can be turned off by doing this.
What is disconnecting the battery?
What is the type of wire commonly used in a solenoid?
Copper wire?
The movement of electric charges in the Earth's core causes this...
What is the Earth's magnetic field?
The flow of current electricity requires a closed path, often called this.
What is a circuit?
Rubbing a balloon on your hair creates static electricity because of this action.
What is transferring electrons?
Increasing the number of loops of wire and increasing the amount of current flowing through the wire.
What are 2 ways you can increase the power of an electromagnet?
If the electric current flowing through a solenoid increases, this part of the electromagnet also increases.
Answer: What is the strength of the magnetic field?