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A cable consisting of a wire 3 mm in diameter is insulated with 3 mm thick dielectric of relative permittivity 10. Calculate the capacitance of 1 km length of the cable. $(A)\; 506 \mu F \qquad (B)\; 0.506 \mu F \qquad (C)\; 1.506 \mu F \qquad (D)\; 2.506 \mu F$

1 Answer

(A) 0.5 mm
Hence A is the correct answer.
answered Jun 16, 2014 by meena.p

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