Question

A 500 watt electrical heater operates at 100 V. Find the current in the heater.Group of answer choices2 A3 A5 A10 A

Answer 1

5 A

Step-by-step explanation

to find the current we need to use the expression

`\begin{gathered} P=IV \\ \text{where P is the power} \\ I\text{ is the current} \\ \text{V is the voltage} \end{gathered}`

Step 1

a) Let

`\begin{gathered} I=\text{ I} \\ V=\text{ 100 v} \\ P=500\text{ watts} \end{gathered}`

b) now, replace and solve for I

`\begin{gathered} P=IV \\ 500(watts)=I\cdot100v \\ \text{divide both sides by 100 v} \\ \frac{500(watts)}{100\text{ v}}=\frac{I\cdot100v}{100\text{ v}} \\ 5Amperes=I\text{ } \end{gathered}`

therefore, the answer is

5 A

I hope this helps you