MHT CET 2022 Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET 2022

Two identical parallel plate air capacitors are connected in series to a battery of e.m.f. 'V'. If one of the capacitor is inserted in liquid of dielectric constant 'K' then potential difference of the other capacitor will become

Answer: (B)

Solution

Initially each capacitor has capacitance . After one is immersed in the liquid its capacitance becomes ; the other stays . In series the charge on both is . The potential difference across the air capacitor is $ =

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Question ID VK-095867