A wire of cross-sectional area 0.60mm2 has a restivity of 7.2 x 10-7 \(\Omega\). Calculate the len.... Question 21775

A wire of cross-sectional area 0.60mm² has a restivity of 7.2 x 10^-7 \(\Omega\). Calculate the length of wire that will have a resistance of 3\(\Omega\).

0.25m

2.50m

3.60m

36.00

Correct answer is B

R = \(\frac{PL}{A}\)

C = \(\frac{RA}{P}\)

C = \(\frac{0.60 \times 10^{-6} \times 3}{7.2 \times 10^{-7}}\)

C = 2.50m

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A wire of cross-sectional area 0.60mm2 has a restivity of 7.2 x 10-7 \(\Omega\). Calculate the length of wire that will have a resistance of 3\(\Omega\).

Aptitude Tests

A wire of cross-sectional area 0.60mm² has a restivity of 7.2 x 10^-7 \(\Omega\). Calculate the length of wire that will have a resistance of 3\(\Omega\).