If you know watts and volts, how do you solve for current (I)?

To solve for current (I) when you have the values for watts (W) and volts (V), you can use the relationship defined by Ohm's Law, where power (P) is calculated as the product of current and voltage. The formula for power can be expressed as:

[ P = V \times I ]

To find the current, you can rearrange this formula. By isolating current, you divide both sides by voltage:

[ I = \frac{P}{V} ]

Since power in this context is represented in watts, the equation becomes:

[ I = \frac{W}{V} ]

This shows that current is calculated by dividing the power (in watts) by the voltage (in volts). This is the rationale behind the correct answer, where current (I) is the result of this calculation.

The other options misrepresent this relationship. For example, one suggests multiplying watts by volts, which does not follow the power equation and would not yield correct units for current. Others incorrectly rearrange the relationship, leading to outputs that do not align with the established formulas in electrical circuit theory. Therefore, understanding the foundational equation of power is crucial for determining the relationship between current, voltage, and power.