Electricity
Like charges ____________
repel
What happens if you try to put two red ends of a magnet near each other?
They push away from one another
Opposite charges _________
attract
True or false, all magnets are bar shaped?
false
Who is the best teacher at Meadville?
Mr. Ritchey
What is the force taken to push an electric current?
voltage
Describe what a magnetic field looks like when drawn out
It appears as ovals surrounding the magnet reaching from pole to pole
What do each of the letters represent in ohm's law? V=IR?
v- voltage
i- current/amps
r- resistance
Electromagnets are used in electric motors and generators. true or false?
true
What will happen if a charged balloon is placed over a pile of pepper?
The pepper will cling to the balloon
What describes how fast the current is moving?
amps
Magnets have positive and negative ends, or _____ and _____ poles?
north and south
Explain the difference between parallel and series circuits?
A parallel circuit has multiple loops whereas a series circuit has one big loop
What material are most magnets made of?
iron
What are the three main parts of an electric motor?
A battery, wire, and a magnet
What do we call the force trying to stop the current?
resistance
What will happen to a piece of iron with a charged coil of wire surrounding it?
It will become a magnet
What is the unit for resistance?
ohms
What must happen for a piece of iron to be a magnet?
All of the electrons must spin in the same direction
When will a circuit function, when the switch is closed or open?
closed
Do our homes use direct current or alternating current?
alternating current, ac
What happens to the strength of magnets as they get closer together?
A battery is an example of what, alternating current or direct current?
Direct current, dc
What will happen if you break a magnet in half?
You will have two new magnets
Why do birds not get shocked when resting on power lines?
There is no where for the current to flow beyond the bird. it would have to touch a second wire to be zapped