Question

State the physical quantity which is equal to the ratio of potential difference and current. Define its SI unit.

Answer 1

Electrical resistance, R=V/I

The resistance of a conductor is said to be one ohm if the potential difference applied across its ends is 1 volt and a current, of 1 A flows through it. It SI unit is ohm (Ω)

1 Ohm= 1 volt/1 ampere.