the resistance of wire of length 1m is 22 ohm at 20°c the diameter is 0.4 m find its resistivity
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Answer:
l = 1m
R = 22 ohm
diameter = 0.4m
thus radius = 0.2m
area = pi x r^2
Resistivity = R \frac{a}{l}
thus = 22 * 0.62/1 = 13.64 ohm meter
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