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Calculate the resistance of a 1km …

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Calculate the resistance of a 1km long copper wire of area of cross section 2*10–2 cm2.The resistivity of copper is 1.623*10-8 ohm-meter.

Posted by Cipha Rose 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Harsh Kumar 5 years, 3 months ago

given . length=1Km=1000 m, . area=2*10^-2 cm^2= 2*10^-2 * 10^-4 = 2*10^-6m^2 . resistivity =1.623*10^-8 R= resistivity *length /area R= 1.623 *10^-8 * 1000/2*10^-6 R= 1.622*10^-8 *10^9 /2 R= 8.1 ohm

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CBSE > Class 10 > Science