Question

A hair dryer operating from 120 v has two settings, hot and warm. in which setting is the resistance likely to be smaller?

Answer 1

The resistance in a hair dryer is likely to be smaller in the hot setting, as more current is needed to generate higher temperatures, and according to Ohm's law, increased current with constant voltage means decreased resistance.

Step-by-step explanation:

In a hair dryer, when comparing the hot and warm settings, the resistance is likely to be smaller in the hot setting. This is because in order to produce more heat (and therefore a hotter airflow), the hair dryer must draw more current. According to Ohm's law, which states that V = IR (voltage equals current times resistance), if the voltage remains constant and the current increases, the resistance must decrease in the hot setting. It's important to note that the actual power output of a hair dryer on hot versus warm also depends on the design and the electrical components in the circuit beyond just the resistance.

Answer 2

Resistance is more likely to be smaller on hot