Do we need to understand Electricity to make a computer?

Answer 1

If you talking about circuitry, yes...

Answer 2

yes because without the electricity you wont be able to run computer.
Ex: all components might need to run at a certain voltage. If its too high then the components might burn, if too low it wont work.

Answer 3

If you have a good knowledge of physics , you can make anything .
Circuitry , wiring , etc. all comes under physics.