Electromagnets
Define a electromagnet.
What is a magnet created using electric currents?
Electric generators are devices that use a _____ to create electricity.
What is a magnet?
Electric motors use _____________ to create electricity.
What is mechanical energy?
A path where electric charges can flow.
What is a circuit?
In both electric particles and magnets, similar particles/pole 1.______ and opposite particles/poles 2._______.
1.What is repel?
2.What is attract?
Name the most commonly used metal in electromagnetism. (Hint: we used this metal in our lab)
What is iron?
When the shaft of a electric generator is rotating, what energy does it create?
What is mechanical energy?
Name three things that electric motors are used for.
What are automobiles, power tools, industrial fans, pumps and some household appliances?.
What is a independent variable in a science experiement?
What you are changing.
Name all three metals that can be magnetized.
Iron, Nickel, Cobalt
DOUBLE JEOPARDY!!!!!
What type of wire works best for electromagnets?
What are copper wires?
What object is used exclusively by electric generators in order to create electricity?
What are turbines?
Electric motors are ______ from electric generators.
What is opposite?
Another name for electric energy. (NOT electricity)
What is voltage?
What do magnetic and electric field lines have in common?
They both DO NOT cross.
What two things can be changed in electromagnets?
What is strength and direction?
Fossil fuels are burned to heat water and create ______ that then spins a turbine.
What is steam?
What is rotational movement?
What type of magnet is an electromagnet?
What is a temporary magnet?
DOUBLE JEOPARDY!!!!
How many times do you need to coil a wire around a metal in an electromagnet AT LEAST.
15
The main energies exerted from electromagnets are magnetic and electric energy. However, there is one more that is not clearly stated. What type of energy am I talking about?
What is thermal energy?
List all four steps in how an electric generator operates.
1. A loop of wire placed within a magnet. The loop is connected to a shaft as well.
2.The shaft rotates which causes the wire to rotate in the magnet as well.
3. The loop of wire moves relative to the magnet which then causes the magnet to exert magnetic force onto the wire. This leads to the wire to have charges being pushed through it causing an electric current.
4. The electric current carries the electrical energy to wherever it needs to go.
List all four steps in how a electric generator operates.
1. A power pushes electric currents through a loop of wire.
2. The wire is then placed within a magnet.
3. Magnetic force is then exerted by the magnet which causes the wire to rotate.
4. The wire is connected to a shaft. The shaft rotates with the loop of wire.
What is a dependent variable in a science experiment?
What you are measuring.
Electromagnets are used in many things like generators and motors. Name TWO other things that could use electromagnets.
What are MRI machines, earbuds/headphones, speakers, and junkyard cranes?