How do we calculate resistance?

1 Answer

ELECTRICAL resistance...

Explanation:

You should be more specific in further questions you ask because "resistance" can be thermal, electrical, geological, -friction- and so on.

I suppose you mean electrical r.

Electrical resistance is found with this formula derived from Ohm's Law:

R=V/I

where...

V is electric potential difference (voltage)
I is the e. current
R is resistance