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Questions  

A parallel plate air capacitor has a capacitance of 50μF .  The plates are at a distance d apart. If a slab of thickness  t(td)  and dielectric constant 4 is introduced between the parallel plates, then the capacitance will be

a
50 μF
b
100 μF
c
200 μF
d
500 μF

detailed solution

Correct option is B

Capacitance will increase but not 4 times (because dielectric is not filled completely). Hence new capacitance may be 100 μF.

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