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A parallel plate air capacitor has a capacitance of 100μF. The plates are at a distance d apart. If a slab of thickness 

t(t \leq d)

   and dielectric constant 5 is introduced between the parallel plates, then the capacitance will be

a
b
c
d

detailed solution

Correct option is C

Capacitance will increase but not 5 times (because dielectric is not filled completely). Hence new capacitance may be 200 μF.

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