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Foundations

The building blocks of electricity — voltage, current, and resistance, Ohm's law, and the pioneers who first described them.

Electricity

Electricity

Voltage

Voltage

Electric current

Electric current

Electrical resistance and conductance

Electrical resistance and conductance

Ohm's law

Ohm's law

Electrical network

Electrical network

Direct current

Direct current

Alternating current

Alternating current

Georg Ohm

Georg Ohm

Alessandro Volta

Alessandro Volta

André-Marie Ampère

André-Marie Ampère

Electric power

Electric power