Two condensers of capacitance 4μF and 5μF are joined in series. If the potential difference across 5μF is 10V, then the potential difference across 4μF condenser is :
A
22.5V
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B
10V
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C
12.5V
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D
25V
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Solution
The correct option is C12.5V When two capacitors are in series Q present on then is same ∴Qon5μF is Q=5×10−6×10 Q=5×10−5 ∴Q on 4μF is 5×10−5 ∴V=QC V=5×10−54×10−6 V=12.5V