Question

A hair dryer draws a current of 10 A plugged into a 120 V outlet. What is the resistance of the hair dryer?

Answer 1

This problem can be solved by the formula used to find resistance. The formula is R=V/I which basically means divide the Voltage by the Current to find the Resistance in an object. Ohm's law.

Answer 2

Answer: The resistance of the hair dryer is $12\Omega$

Explanation:

Ohm's law is defined as the law which gives us the relationship between voltage, resistance and current.

Mathematically,

$V=I\times R$

where,

V = voltage of the hair dryer = 120 V

I = current of the hair dryer = 10 A

R = resistance of the hair dryer = ?

Putting values in above equation, we get:

$120=10\times R\\\\R=\frac{120}{10}=12\Omega$

Hence, the resistance of the hair dryer is $12\Omega$