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JEE Main 2003 (AIEEE) · Dielectrics

Dielectrics question from JEE Main 2003 (AIEEE)

Q113JEE Main 2003 · AIEEEEasy

Dielectrics

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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Answer: (b)

Metal sheet of thickness $t$ : $C' = \frac{\varepsilon_0 A}{d - t}$ .
Negligible thickness, $t \to 0$ : $C' = \frac{\varepsilon_0 A}{d} = C$ .
So the capacitance remains unchanged: answer (b).

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