Q. 4

The equivalent ca A. C

B. 2C

C. C/2

D. none of these

Answer :


Since the both ends of the capacitor on the right is connected at same point.


Both the plates of the capacitor are at same potential and potential difference across capacitor becomes 0


V=0


And the capacitor C on the right now becomes useless and


Thus, capacitor is replaced by a short circuit.


The circuit now becomes



Which involve two equal capacitors of capacitance C connected in parallel.



Thus, the equivalent capacitance of the two capacitor in parallel combination is


Ceq=C1+C2


Since C1=C2=C


Putting the value in the above formula, we get


Ceq=C+C=2C


Therefore, equivalent capacitance of the combination is C+C=2C.


Thus, the equivalent capacitance of the combination is 2C

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