Magnets
What are the two ends of a magnet called ?
the north and south poles
What are the two charges present in an electric force?
positive and negative
define electromagnet
the combination of electric and magnetic forces
what is a closed circuit
a complete loop that allows energy to travel
what train uses magnets to travel at high speeds?
the maglev train
what happens when a north and south pole interact?
they attract
what happens when two positive charges interact?
they repel
whats one factor that can increase the strength of an electromagnet?
increasing the loops of wire
also accept - bigger power source or bigger magnet
the switch
why does a compass always point north?
earth has a magnetic field - the compass points to earths magnetic north
what three metals are magnetic ?
iron, nickel, and cobalt
What is a charged atom called?
ion
what inventor was responsible for making a motor using an electromagnet?
Michael Faraday
name the 4 main parts of a circuit
power source, conductor, load, switch
load stones
whats the difference between a permanent and temporary magnet ?
permanent magnets are always magnetic, temporary magnets can be turned on and off
electrons flowing through a conductor (like a wire) is what type of energy?
electrical energy
when building an electromagnet in the lab, what material acted as the insulator?
the tape
define conductor
allows the flow of energy
what happens when you break a magnet in half?
you get 2 smaller magnets - both having a north and south pole
magnetism occurs when all electrons do what?
whats the difference between static and current electricity?
static electricity does not move in a circuit, current electricity does.
how can you increase the strength of a solenoid?
add iron to the middle
energy always flows from the _____ terminal to the _______ terminal.
negative to positive
what term means the magnet is made of to iron?
ferromagnetism