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5.36 Two homogeneous dielectric regions 1 (p S 4 cm) and 2 (p z 4 cm) have dielectric
constants 3.5 and 1.5, respectively. If D, = 12a, – 6a, + 9a, nC/m², calculate (a) E,
and D1, (b) P2 :
and
Ppv2
(c) the energy density for each region.

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