Question

how can ohm's law be used to define ohm?

Answer 1

According to Ohms law,
V=IR
If V= 1V and I= 1A then
R=1 ohm.
So 1 ohm can be defined as the resistance offered by a wire flowing 1 A current and develops the potential difference of 1V.

Answer 2

Answer:

An constant temperature the current flowing through a conductor is directly potential to the potential difference across its ends.

If the potential difference across the ends of conductor is doubled the current flowing through it also gets double and if the potential difference is halved, the current also get halved.The si unit of resistance

V=I×R

R=V/I

R=V/A

R=VA-1= OHM (omega) (ohm).