What can iron filings be used to show?
Why does the needle of a compass point to magnetic North?
What will the north poles of two bar magnets do when brought together?
How many poles to all magnets have?
What a current-carrying wire is wrapped around an iron core, what can it create?
What does a transformer between utility wires and your house do?
If a transformer has 3 coils input, and 9 coils output, what is the change in voltage?
Which energy transformation occurs in an electric motor?
What prevents most charged particles from the Sun from hitting the Earth?
Magnetic fields that surround all magnets exert
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