What is the main formula for resistance?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The main formula for resistance is Ohm's Law: R = V/I
Where:
- R = resistance in ohms (Ω)
- V = voltage in volts (V)
- I = current in amperes (A)
Another fundamental formula relates resistance to physical properties: R = ρL/A, connecting resistance to resistivity, length, and cross-sectional area.
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