If a bathroom heating unit draws 10 amperes at 115 volts, what should be the hot resistance of the heating unit?

To determine the hot resistance of the heating unit, you can use Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R). This relationship can be expressed with the formula:

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

In this scenario, the heating unit draws 10 amperes of current at 115 volts. Plugging those values into the formula:

[ R = \frac{115 \text{ volts}}{10 \text{ amperes}} ]

Calculating this gives:

[ R = 11.5 \text{ ohms} ]

As a result, the correct answer reflects that the hot resistance of the heating unit is indeed 11.5 ohms. This calculation is fundamental in electrical systems, as understanding resistance helps in optimizing performance and safety in heating applications.