When resistors are connected in parallel, the supply current is equal to the sum of ... For the circuit above, the formula for finding the total resistance of resistors in parallel is \(\frac ...

The symbol for resistance is R, it is measured in ohms \((\Omega )\). The symbol for current is I, it is measured in amperes \((A)\).

which defines the relationship between current, voltage, and resistance. If we know two out of the three, we can calculate the unknown. This is the underlying principle behind the current shunt.