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JEE Mains 05-Sep-2020 Shift 2 Solved Paper

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Question : 2

Total: 75

A parallel plate capacitor has plate of length 'l', width 'w' and separation of plates is 'd'. It is connected to a battery of emf V. A dielectric slab of the same thickness 'd' and of dielectric constant k=4 is being inserted between the plates of the capacitor. At what length of the slab inside plates, will be energy stored in the capacitor be two times the initial energy stored?

l / 4
l / 2
l / 3
2
l
3

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