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A metal foil of negligible thickness is introduced between the two plates of a capacitor at the centre. The capacitance of capacitor will be
A. same
B. double
C. half
D. k times

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Correct Answer - A
`C=(in_(0)A)/(d-1(1-1/k))`
For metal `k=infty` and t is negligible.
`therefore" "C=(in_(0)A)/d="same"`

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