A) \[\frac{Q}{2}\]
B) \[\frac{Q}{\sqrt{2}}\]
C) \[\frac{Q}{\sqrt{3}}\]
D) \[\frac{Q}{3}\]
Correct Answer: B
Solution :
Energy stored in a capacitor of capacitance C, charge Q is, \[U=\frac{1}{2}\frac{Q}{C}\] Since energy is stored equally between electric and magnetic fields, \[\therefore \] \[E=\frac{1}{2}\,\left( \frac{1}{2}.\frac{{{Q}^{2}}}{C} \right)\] Now, \[\frac{{{Q}^{'2}}}{2C}=\frac{1}{2}.\frac{{{Q}^{2}}}{2C}\] \[\Rightarrow \]\[Q'=\frac{Q}{\sqrt{2}}\]You need to login to perform this action.
You will be redirected in
3 sec