What formula is used to calculate current in a circuit?

1. Current (I) equals voltage (E) multiplied by resistance (R)
2. Current (I) equals voltage (E) divided by resistance (R) [I=E/R Ohm's Law] ✓ Correct answer
3. Current (I) equals voltage (E) added to resistance (R)
4. Current (I) equals voltage (E) minus resistance (R)

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