Question

The power in an electrical circuit is given by the equation P = I2R, where I is the current flowing through the circuit and R is the resistance of the circuit. What is the current in a circuit that has a resistance of 30 ohms and a power of 2 watts

Answer 1

P = I²R
2 = I² * 30
⇒I = √(1/15) Ampere.
⇒I = 0.2581 Ampere