Question

The resistance of a metal wire of length 2 m is 40 ohm at 20°C. If the diameter of the wire is
1 mm, then what will be the resistivity of the metal at that temperature?
(A) 1.28 x 10^-8 ohm meter (B) 1.57 x 10^-9 ohm meter (C) 1.75 × 10^-9 ohm meter (D) 1.88 ×10^ -8 ohm meter
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Answer 1

Answer:

dont know

Explanation: