Whenever an electric charge moves, it creates ______________ forces.
What is magnetic?
100
Like poles of a magnet ________________.
What is repel?
100
All magnets have 2 of these. One sounds like Santa's workshop but I guarantee you won't find any elves there.
What are poles?
200
Maglev devices are efficient because there is no ___________.
What is friction?
200
Opposite poles of a magnet ________________.
What is attract?
200
The definition of this is "the ability of an object to push or pull on another object that has the magnetic property."
What is magnetism?
300
An electric magnet is different from a permanent magnet because an electromagnet
A) is magnetic.
B) can push and pull.
C) can attract some metals.
D) can turn on and off.
D) can turn on and off.
300
An electromagnet works because moving ___________ generate magnetic forces.
What are electrons?
300
Earth is a giant one of these.
What is a magnet?
400
With the root word that means "new", this metal is no super hero...but it does make a super magnet.
What is neodymium?
400
Three primary metals attracted to magnets.
What are iron, nickel and cobalt?
400
Should you ever decide to journey to the center of the Earth, you may get burned badly because it contains 2 of these molten metals. Oh yeah...they're the reason the Earth is magnetic.
What are nickel and iron?
500
This device uses an electromagnet and a permanent magnet to produce alternating polarities that are "all about the bass...AND treble"
What is a speaker?
500
This device uses an electric current that produces a magnetic field.
What is an electromagnet?
500
These things must be aligned in order for a metal to be considered magnetic.