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The current density in a wire is \( 10 \mathrm{~A} / \mathrm{cm}^{2} \) and the electric field in the wire is \( 5 \mathrm{~V} / \mathrm{cm} \). If \( \rho= \) resistivity of material,
P \( \sigma= \) conductivity of the material then (in S.I. units):
(a) \( \rho=5 \times 10^{-3} \)
(b) \( \rho=200 \)
(c) \( \sigma=5 \times 10^{-3} \)
(d) \( \sigma=200 \)
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