A 10 ohm resistor in a series with a bulb and a 12v source. a) If the 8.0V is across the bulb, what is the voltage across the resistor? I wrote 4v, is this correct? b) What is the current in the circuit? I wrote 1.5A, is this correct? c) What is the resistence of the bulb? Could someone please tell me the formula I would need to know to complete this question?