Physics

Problem

State the correct expression for the equivalent resistance

R_{\text{eq}}

of three resistors

R_1, R_2

and

R_3

connected in series. a)

R_{\text{eq}} = \dfrac{R_1 R_2 + R_2 R_3 + R_3 R_1}{R_1 + R_2 + R_3}

R_{\text{eq}} = R_1 + R_2 + R_3

R_{\text{eq}} = \dfrac{R_1 + R_2 + R_3}{3}

\dfrac{1}{R_{\text{eq}}} = \dfrac{1}{R_1} + \dfrac{1}{R_2} + \dfrac{1}{R_3}