A 12 ohm hair dryer is plugged into a 240 V power supply. What is the current?

Prasath Albert asked Jul 21, 2023

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Prasath Albert asked Jul 21, 2023

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19 votes

Given,

The resistance of the hairdryer, R=12 Ω

The voltage of the power supply, V=240 V

From Ohm's law,

Where I is the current.

On substituting the known values,

$\begin{gathered} 240=I*12 \\ \Rightarrow I=(240)/(12) \\ =20\text{ A} \end{gathered}$

Thus the current is 20 A.

Sahil Arora answered Jul 25, 2023

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