Final answer:
The expression for calculating the power of a light bulb is P = VI, where P represents power, V represents voltage, and I represents current. To calculate the current, you can rearrange the formula as I = P / V. In this case, with a power of 0.500 W and voltage of 3.00 V, the current would be 0.167 A.
Step-by-step explanation:
The expression for electric power in light bulbs is given by Power = Voltage x Current (P = VI). So, the correct option to calculate the power of a light bulb is a) Voltage x Current.
In this case, since the power is given as 0.500 W and the voltage is given as 3.00 V, you can calculate the current by rearranging the formula and solving for current: Current = Power / Voltage (I = P / V).
Substituting the given values, the current will be 0.500 W / 3.00 V = 0.167 A.