Question

Three 7Ω resistors are connected in series across a 10 V battery. What is the equivalent resistance of the circuit?

Answer 1

21Ω

Explanation:

Given:

R1 = R2 = R3 = 7Ω

The resistance in a series circuit has the following equation

`R_(eq)=R_1+R_2\ldots+R_n`

We replacing in this case:

`\begin{gathered} R_(eq)=R_1+R_2+R_3 \\ R_(eq)=7+7+7 \\ R_(eq)=21\Omega \end{gathered}`

The equivalent resistance of the circuit is 21Ω