Question

A wire of length 40 cm and area of cross-section 0.1 mm square has a resistance of 0.8 ohm. Calculate specific resistance of wire in SI units.
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Answer 1

Answer:

I = 40 cm, area of cross – section a = 0.1 mm2 = 0.1/100cm2 R = 0.8 Ω

Specific resistance of wire p = Ra/l = (0.8/40) × 1/1000

P = 0.00002 Ω – cm

Answer 2

Answer:

The specific resistance of this wire is 2 × 10^-8 ohm meter.

explanation of this is attached above.