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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 εr= 4.(i) Calculate capacitance of each capacitor if equivalent capacitance of the combination is 4 μF.(ii) Calculate the potential difference between the plates ofX and Y.(iii) Estimate the ratio of electrostaticenergy stored in X and Y. |
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Answer» `therefore V+V/5="12 VOLT "rArr (6V)/(5)="12 volt or V=10volt"` p.d. across X=10 volt p.d. across `Y=(10)/(5)="2 volt"` ii. `("Energy stored in X")/("Energy stored in Y")=(1/2 C(10)^(2))/(1/2 5C(2)^(2))=(100)/(20) 5:1 [therefore E=1/2 CV^(2)]` 
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