Calculate the resistance of 100 m long copper wire. The diameter of the wire
is 1 mm, take rhow 1.7 x 10 power -8
ohm m.
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Answer:
resistance = 40.8 ohm
Explanation:
the length = 100m
diameter = 1mm = 0.001m
radius = 0.0002m
area of cross section = 0.00000004π m
resistance =
(1.7 *10^-8 *100)/0.00000004 ohm
=(1.7*10^10 ) /4*10^8 ohm
=(1.7*100)/4 ohm
= 40.8 ohm
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