A wire made from aluminum of resistivity 2.8×10–⁸ Ohmmeter has a length of 30 meter cross sectional area of 0.45cm². Find the resistance of the wire?
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Answer:
1.86 × 10^-2 ohm
Explanation:
R= resistivity × length/ cross-section area
just put the values in SI unit, do some basic multiplication and division you'll get this answer.
1cm^2 = 10^-4 m^2
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