Find resistivity of a wire of length 2m having resistance 10 ohm and diameter 0.4mm.
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Step-by-step explanation:
Given that:
R=10ohm
l=2m
d=0.04m
Find out: Resistivity (rho) =?
Formula: R=rho×l/A
=) rho=RA/l
=) rho=10×pie r²/2
=) rho= 10×22×0.02×0.02/2×7
=) rho= 0.044/7
=) rho= 0.00628 ohm meter
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