Resistance of metal wire of length 1m having diameter 0.3 mm, what will be the resistivity of the metal?
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r = d/2 = 0.3 mm / 2 = 3x10^ -4 / 2
r = 1.5*10^ -4 m
R = ρl / A
ρ = RA / l
= R ( πr^2) / l
= R ( π *(1.5*10 ^ -4) ^2 ) / 1
= R {(7.065) x 10^ -8}
good evening______✌️✌️✌️✌️✌️
___________________________
_____________
___________________
_________
r = d/2 = 0.3 mm / 2 = 3x10^ -4 / 2
r = 1.5*10^ -4 m
R = ρl / A
ρ = RA / l
= R ( πr^2) / l
= R ( π *(1.5*10 ^ -4) ^2 ) / 1
= R {(7.065) x 10^ -8}
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