Home
Class 12
PHYSICS
Two wires of equal length, one of copper...

Two wires of equal length, one of copper and the other of aluminium have the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are prefered for overhead power cables.`(P_(Al) = 2.63 xx 10^(-8) Omega m , P_(Cu) = 1.72 xx 10^(-8) Omega m`, Relative density of Al = 2.7 , of Cu = 8.9.

Promotional Banner

Similar Questions

Explore conceptually related problems

Calculate the length of an aluminium wire of diameter 0.4 mm required to have a resistance of 2 Omega at 20 ^@C . Resistivity of aluminium is 2.8 xx 10^-8Omegam .

A wire connected in the left gap of a meter bridge balance a 10Omega resistance in the right gap to a point which divides the bridge wire in the ratio 3:2 . If the length of the wire is 1m. The length of one ohm wire is

A galvanometer is to be converted into an amme ter of range 0 - 1A. Galvanometer has resistance 100 ohm and the current for full scale deflection is 10mA. Find the length of the nichrome wire to be used as shunt. Given, Resistivity [p= 1.1 * 10^(-8) ohm m] Diameter of the wire = 1mm