it is a machine that changes energy to electrical energy
100
in a dam what is the name for a place where the water can go through the dam
What is a penstok
100
the unit for measuring electrisaty
What is watt
200
what causes earth magnetic field
it has iron and nickel
earth rotates
200
describe the main parts of a electric magnet
What are a wire, a battery and a nail
200
true or false ac current is stronger then dc current
true
200
what do you call the making of energy using water
What is hydroelectricity
200
the amount of energy used in a certain time
What is electric power
300
a temporary magnet is made this way
what is by taking a magnetic substance and stroking it against a permanent magnet
300
the process of getting electrons to move through a wire
what is induction
300
this is used to create electricity in hydroelectricity
What is a turbine
300
what do you call the making of electricity when the water goes down cold and comes up hot
What is geothermal energy
300
a connected system across the cuntry
What is a electric power grid
400
what are three miteral that stick to a magnet
What are iron, nickel and cobal
400
haw can we strengthen a magnet
attach a magnet to
400
a blank uses an electromagnet to change electrical to mechanical energy
What is an electric motor
400
what do you call the making of energy where there are a lot of solor cells
What is a solor panel
400
the moist common use in America
What is coal
500
describe what happens to a magnet in these situations
north pole to north pole
south pole to south pole
south pole to north pole
north pole to south pole
a repel
b repel
c attract
d attract
500
describe haw to magnets can be used to produce electric current