Question

What are some examples of capacitors in series?

Answer 1

Well basic principle says that,when you have two capacitors of capacitance `C_1` and `C_2` is series,the equivalent capacitance becomes, `(C_1 C_2)/(C_1+C_2)`

Well I am giving you only one example where the circuit looks like a series combination of capacitors,but is not so.

suppose in the figure above,all the capacitors has a capacitance of `C`,and you are asked to find the equivalent capacitance between point `A` and `B`

Now,current will follow the pathway having least resistance,so it will not flow through the `3` capacitors present in between the terminal two capacitors,i.e current will follow along the path of `CF` in which no capacitor is present.

So,we have two capacitor of capacitance `C` in series,hence the equivalent capacitance of the circuit becomes, `(C*C)/(C+C) =C/2`

Hope this helps you :)