Two equal capacitors are first connected in series and then in parallel. The ratio of the equivalent capacities in the two cases will be
JEE MAIN 2021, Medium
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For series combination
$C _{ eq _{2}}= C + C \Rightarrow C _{ eq _{2}}=2 C$
$\Rightarrow \frac{ C _{ eq _{1}}}{ C _{ eq _{2}}}=\frac{( C / 2)}{2 C }=\frac{1}{4}=1: 4$
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