1.

A sheet of aluminium foil of negligible thickness is placed between the plates of a capacitor of capacitance C as shown in the figure, the capacitance of capacitor becomes

Answer»

2C
C
`(C)/(2)`
zero

Solution :`(1)/(C') = (1)/(C_(1)) + (1)/(C_(2))`
`C_(1) = (epsilon_(0)A)/(d//2), C_(2) = (epsilon_(0)A)/(d//2)`
`:. (1)/(C') = (d)/(epsilon_(0)A) :. C' = (epsilon_(0)A)/(d) = C`


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