Magnetism and Electricity

What I think I know:

Magnets are made of INC iron,nickel,cobalt.

Magnets can be different shapes and sizes.

Some magnets are strong or weak.

Electricity comes from a big battery.

Electricity is on when the lever is closed and electricity is off when it is open.

What I want to know:

Why do magnets repel?

How does electricity work?

Why do magnets attract?

How do magnets attract and repel?

How does electricity turn things on?

How much electricity does it take to power a T.V?

Why do we have magnets?

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