Question

calculate the resistence of a metal wire of length 2m and area of cross section 1.55×10 to the power-6 .if the resistivity of the metel 2.8×10 to the power-8 ohm's m​

Answer 1

we know that

resistance = resistivity × length/cross sectional area.

$resistance \: = \frac{2 \times 2.8 \times {10}^{ - 8} }{1.55 \times {10}^{ - 6} }$

resistance = 3.61× 10^-2.

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Answer 2

Resistance = 3. 61 × 10 ^-2 Ohm