Question

there are three capacitors of value 2 micro farad , 3 micro farad , 6 micro farad. how will you connect them to a resultant capacity of 4 micro farad ?

Answer 1

Hey mate

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Connect 3 micro farad and 6 micro farad capictors in series and 2 micro farad capictor in parallel to the 3 micro farad and 6 micro farad capictor ........you will got the equivalent Capictance equals to 4 micro farads.......hope it helps uh
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Answer 2

We would get an equivalent capacitance of 4 uF of a circuit by placing capacitors 3 uF and 6 uF in series and putting 2 uF in parallel with them.

So, we would have the equivalent resistance as

C = C1 + C2

where

 1 / C1 = 1/3 + 1/6

is the series combination of 3 uF and 6 uF

and 

C2 = 2

so, we have

C = 1 / (1/3 + 1/6) + 2

so,

C = 2uF + 2 uF = 4 uF

All the best✌