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Is it possible to operate two 1250 W hair dryers on a 120 V circuit without blowing a 20 amp fuse?

1 Answer

6 votes

Given:

The power of each hair dryer is,


P=1250\text{ W}

The potential across the circuit is,


V=120\text{ V}

The fuse has current


i=20\text{ A}

To find:

Is it possible to use that fuse or not

Step-by-step explanation:

The power for two heaters is,


\begin{gathered} P^(\prime)=2P \\ =2*1250 \\ =2500\text{ W} \end{gathered}

The current for this power is,


\begin{gathered} I=(P^(\prime))/(V) \\ =(2500)/(120) \\ =20.8\text{ A} \end{gathered}

Here, we see the current for the dryers is greater than the fuse's current.

Hence, it is not possible to use the given fuse.

User Kaqqao
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