Question

A partially completed table for a series circuit is given below. Find the missing valuesand use them to answer the following two questions.What is the current for R2?

Answer 1

We know that the circuit is connected in series. In this kind of circuits the equivalent resistance is:

`R_(eq)=R_1+R_2`

We also know that the total voltage in the circuit is equal to the sum of the voltage in each resistor, then:

`V=V_1+V_2`

From this two things we know that:

Now, using the relation:

`R=(V)/(i)`

We can calculate the current in resistor one:

`\begin{gathered} 6=(30)/(i) \\ i=(30)/(6) \\ i=5 \end{gathered}`