Saved Bookmarks
| 1. |
Two parallel plate capacitors X and Y have the same area of plates and same separation between them , X has air between the plates while Y contains a dielectric medium of epsi_(r) = 4. Estimate the ratio of electrostatic energy stored in X and Y . |
|
Answer» Solution :LET ELECTROSTATIC energy STORED in X and Y be `U_(X)` and `U_Y` respectively , then `(U_(X))/(U_(Y)) = ((1)/(2) C_(X) V_(X)^(2))/((1)/(2) C_(Y) V_(Y)^(2)) = (C_(X) V_(X)^(2))/(C_(Y) V_(Y)^(2)) = ((5 mu F)/(20 mu F)) xx ((12 V)/(3V))^(2) = 4 :1` |
|