A copper wire has a diameter 0.5 mm and resistivity 1.6 x 10 raise to power -8 ohmmeter . What will be the length of this wire to make the resistance of 12 ohm ? and how much will be the resistance of another copper wire of same length but half the diameter? pls give fast .....
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P =p l /A
l = P A / p
l =12 x 2 x 3.14 ( 0.5 x10⁻³ )²/ 10⁸
l = 12 x 2 x 3.14 x 0.25 x 10⁻⁶ / 10⁻⁸
l = 24 x 3.14 x 0.25 x 10²
l = 18.84 x 10² m
l = P A / p
l =12 x 2 x 3.14 ( 0.5 x10⁻³ )²/ 10⁸
l = 12 x 2 x 3.14 x 0.25 x 10⁻⁶ / 10⁻⁸
l = 24 x 3.14 x 0.25 x 10²
l = 18.84 x 10² m
puneet19:
hey can u mention the Given pls
hey how much will be the resistance of another copper wire of same length but half the diameter pls tell ...
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