The main formula for Ohm's Law is:
\[
V = I \times R
\]
Where:
- \( V \) is the voltage (in volts, V)
- \( I \) is the current (in amperes, A)
- \( R \) is the resistance (in ohms, Ω)
This formula tells you that the voltage across a resistor is equal to the current flowing through it multiplied by the resistance.