If the resistivity of an alloy is `rho'` and that of consituent metals is `'rho'` then

If the resistivity of an alloy is rho' and that of constituent metals is rho , then

If the resistivity of an alloy is rho^(1) and that of constituent metals is rho , then

If the resistivity of an alloy is ____ and that of constituent metal is p, then

The resistivity of alloys =R_(alloy) , the resistivity of constituent metals R_("metal") . Then, usually

A copper wire of length l and radius r is nickel plated till its final radius is 2r. If the resistivity of the copper and nickel are rho_(c) and rho_(n) , then find the equivalent resistance of the wire.

To determine the composition of a bimetallic alloy, a sample is first weighed in air and then in water. These weights are found to be w_1 and w_2 respectively. If the densities of the two constituent metals are rho_1 and rho_2 respectively, then the weight of the first metal in the sample is (where rho_w is the density of water)