A) \[5{{C}_{o}},\ 5{{W}_{o}}\]
B) \[5{{C}_{o}},\ \frac{{{W}_{0}}}{5}\]
C) \[\frac{{{C}_{o}}}{5},\ 5{{W}_{o}}\]
D) \[\frac{{{C}_{o}}}{5},\frac{{{W}_{o}}}{5}\]
Correct Answer: B
Solution :
When a dielectric K is introduced in a parallel plate condenser its capacity becomes K times. Hence \[C'=5{{C}_{0}}\]. Energy stored \[{{W}_{0}}=\frac{{{q}^{2}}}{2{{C}_{0}}}\] \ \[W'=\frac{{{q}^{2}}}{2C'}=\frac{{{q}^{2}}}{2\times 5{{C}_{0}}}\] Þ \[W'=\frac{{{W}_{0}}}{5}\]You need to login to perform this action.
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