The equivalent capacitance for the circuit drawn below is 

Jamb 1978

The equivalent capacitance for the circuit drawn below is 

A. 18µf 

B. 4uf 

C. 2uf 

D. 12uf 

E. 13uf 

ANSWER: Option B

EXPLANATION: To find the equivalent capacitance

For n capacitor series arrangements

1/Ctotal = 1/C1 + 1/C2 + 1/C3 + … + 1/Cn

For n capacitor parallel arrangements

Ctotal = C1 + C2 + C3 + … + Can

Just the opposite of equivalent resistance!

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