What is the total capacitance of three capacitors connected in series if C_1 has a capacitance of 20 µF, C_2 has a capacitance of 30 µF, and C_3 has a capacitance of 60 µF?
C_T=\frac{1}{\frac{1}{C_1}~+~\frac{1}{C_2}~+~\frac{1}{C_3}}
C_T=\frac{1}{\frac{1}{20}~+~\frac{1}{30}~+~\frac{1}{60}}
C _{ T }=10~ \mu F