JEE Main 2013 Physics question
A parallel plate capacitor having a separation between the plates d, plate area A and material with dielectric constant K has capacitance . Now one-third of the material is replaced by another material with dielectric constant 2 K, so that effectively there are two capacitors one with area A, dielectric constant 2 K and another with area A and dielectric constant K. If the capacitance of this new capacitor is C then is
Answer: (2)
Solution
The two parts are in parallel: \frac{2Kε_0(A/3)}{d}$ +
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