What formula is used to calculate current in a circuit?

This question requires a basic understanding of Ohm's Law, which defines the relationship between voltage, current, and resistance. In electrical formulas, 'I' stands for Intensity (current), 'E' stands for Electromotive force (voltage), and 'R' stands for Resistance. To find the current (I) flowing through a circuit, you divide the voltage (E) by the resistance (R). Therefore, the correct formula is I = E / R. A helpful tool to remember this is the Ohm's Law magic triangle, where E is at the top, and I and R are at the bottom. To solve for I, cover it up, and you are left with E over R (division). The option 'I = E x R' is mathematically incorrect, as multiplying voltage and resistance does not yield current.