The power in a lightbulb is given by the equation p- fr where /is the current flowing through the lightbulb and ris the resistance of the lightbulb. what is the current in a circuit that has a resistance of 30.0 o and a power of 2.00 w? a.) 15.0 a b.) 3.87 a c.) 0.258 a d.) 0.067 a ( need answer asap)