Question

What is the powder in watts, P, if the voltage is 850 and the resistance is 170?

Answer 1

From the question

`V=\sqrt[]{PR}`

We are given V = 850 volt and R = 170 ohms

We want to find P

`\begin{gathered} V=\sqrt[]{PR} \\ \text{Square both sides} \\ V^2=PR \\ \text{Divide both sides by R} \\ (V^2)/(R)=P \\ \text{Thus,} \\ P=(V^2)/(R) \end{gathered}`

Substituting

`\begin{gathered} P=(V^2)/(R) \\ P=((850)^2)/(170) \\ P=4250\text{watts} \end{gathered}`

Therefore, the power is

`P=4250\text{watts}`