Question

What is the resistance of a hairdryer if it is 120 volts with a current of 15 amperes?

8 ohms

15 ohms

2 ohms

22 ohms

Answer 1

To find the resistance of the hairdryer, you can use Ohm's Law, which states:

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

Where:
- \( R \) is the resistance in ohms,
- \( V \) is the voltage in volts (120 volts),
- \( I \) is the current in amperes (15 amperes).

Plugging in the values:

\[ R = \frac{120 \text{ volts}}{15 \text{ amperes}} \]

Calculating that:

\[ R = 8 \text{ ohms} \]

So the resistance of the hairdryer is **8 ohms**.