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MHT CET Physics question

PhysicsElectrostatic Potential and CapacitanceMHT CET

A parallel plate capacitor is charged to a certain potential difference. A slab of thickness 3 mm is inserted between the plates and it becomes necessary to increase the distance between the plates by 2.4 mm to maintain the same potential difference. The dielectric constant of the slab is

Answer: (B)

Solution

With the charge unchanged, the same means the same : , so

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Question ID VK-075483