An electric toaster requires 900 W at 100 V.What is the resistance of the heating coil?

Question

Quizplus · Accepted Answer

We can use Ohm's Law to solve this problem. 
Ohm's Law states: V = IR, where V is the voltage, I is the current, and R is the resistance.

We are given the power (P) and the voltage (V). We can use the following equation to find the current (I): 
P = IV

We can then rearrange Ohm's Law to solve for R: 
R = V/I

Plugging in the given values, we get: 
I = P/V = 900/100 = 9 A 
R = V/I = 100/9 = 11.1 Ω

Rounding to the nearest whole number, the answer is 11 Ω.

An Electric Toaster Requires 900 W at 100 V