The plates of a parallel plate capacitor of capacity \[50\mu C\] are charged to a potential of \[100\ volts\] and then separated from each other so that the distance between them is doubled. How much is the energy spent in doing so [MP PET 1997; JIPMER 2000]

\[\frac{P}{4\pi {{\varepsilon }_{0}}{{r}^{3}}}\]

The plates of a parallel plate capacitor of capacity \[50\mu C\] are c

1.	The plates of a parallel plate capacitor of capacity \[50\mu C\] are charged to a potential of \[100\ volts\] and then separated from each other so that the distance between them is doubled. How much is the energy spent in doing so [MP PET 1997; JIPMER 2000]
A.	\[25\times {{10}^{-2}}J\]
B.	\[-12.5\times {{10}^{-2}}J\]
C.	\[\frac{P}{4\pi {{\varepsilon }_{0}}{{r}^{3}}}\]
D.	\[12.5\times {{10}^{-2}}J\]
Answer» B. \[-12.5\times {{10}^{-2}}J\]

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The plates of a parallel plate capacitor of capacity \[50\mu C\] are charged to a potential of \[100\ volts\] and then separated from each other so that the distance between them is doubled. How much is the energy spent in doing so [MP PET 1997; JIPMER 2000]

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