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4. The following fig shows a
parallel-plate capacitor of
A/2-
-A/2
plate area A = 10.5 cm2
2d
K2
K1
Id
and plate separation 2d =
K3
7.12 mm. The left half of
the gap is filled with
material of dielectric constant k1 = 21.0; the top of
the right half is filled with material of dielectric
constant k2 = 42.0; the bottom of the right half is
filled with material of dielectric constant k3 = 58.0.
What is the capacitance?

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