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A 66 KV single core metal sheathed cable has two dielectric layers of relative permittivity of...

A 66 KV single core metal sheathed cable has two dielectric layers of relative permittivity of 5 and 3.5 respectively. The thickness of the first dielectric layer is 1 cm and the second layer is 1.2 cm. The core diameter is 2 cm. Determine:
(a) the maximum stress in the two dielectrics.
(b) the voltage applied across each dielectric.

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