# A charge of #35 C# passes through a circuit every #5 s#. If the circuit can generate #21 W# of power, what is the circuit's resistance?

##### 1 Answer

May 3, 2018

#### Explanation:

We first find the current produced in five seconds. Current is given by the equation,

#Q# is the charge in coulombs

#t# is the time in seconds

So, we get:

Now, power is related by the equation,

#I# is the current in amperes

#R# is the resistance in ohms

#P# is the power in watts

Rearranging for resistance, we get:

Plugging in our given values, we get: