Chemistry is very wonderful subject to explore. You can even produce electric current with two pairs of different metal (we will refer these metals as electrodes) with a solution (electrolyte). Of course you will need a pair of black and white wire and a voltmeter to detect the current.

Here's how its done...

Prepare a salt solution containing one of the metal ions. Then immerse both metals into the solution. Make sure the metals do not make contact with each other. Then connect one of the wire...
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