Physics

Problem

For three capacitors of capacitances

C_1,\,C_2

and

C_3

connected in parallel, which one of the following expressions gives their equivalent capacitance

C_{\text{eq}}

? a)

\displaystyle C_{\text{eq}}=\frac{C_1C_2 + C_2C_3 + C_3C_1}{C_1+C_2+C_3}

\displaystyle C_{\text{eq}}=C_1+C_2+C_3

\displaystyle \frac{1}{C_{\text{eq}}}=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}

\displaystyle C_{\text{eq}}=\frac{C_1+C_2+C_3}{3}