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CBSE Class 12-science Answered

Find the value of C in the following fig., if equivalent capacitance between A and B is 30μf.
Asked by Topperlearning User | 22 Apr, 2015, 11:38: AM
answered-by-expert Expert Answer

Here capacitors of 20 μf and 20 μf are joined in parallel, combined capacitance is given as,

C’ = 20 + 20 = 40 μF

As C and C’ are in series, their resultant capacitance is 30 μF, we have

begin mathsize 11px style 1 over 15 space equals space 1 over 40 space plus space 1 over straight C
1 over straight C space equals space 1 over 15 space minus space 1 over 40 space equals space 1 over 24
straight C space equals space 24 space μF end style

Answered by | 22 Apr, 2015, 01:38: PM
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