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An electrical capacitor with two parallel plates, has a capacitance of 4 micro farads, if it...

An electrical capacitor with two parallel plates, has a capacitance of 4 micro farads, if it was half filled with a dielectric with a Permittivity of 2 ε, its new capacitance in micro farad is:

a) 6

b) 3

c) 4

d) 2

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