Two wires of equal length, one of copper and the other of manganin have the same thickness. Which one will be used for its
electrical heating devices? Why?

Two wires of equal length, one of copper and the other of manganin have the same thickness. Which one will be used for its electrical transmission lines?

Two wires of equal lengths, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two wires of equal lengths, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two wires of equal length, one of aluminium and the other of copper have the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables. ( rho_Al = 2.63 xx 10^-8 Omega m, rho_Cu = 1.72 xx 10^-8 Omega m . Relative density of A1 = 2.7, of Cu = 8.9.)

Two identical solid balls, one of ivory and the other of wet-clay, are dropped form the same height on the flor. Which one will rise to a greater height after striking the floor and why?

Two copper wires, one of length 1 m and the other of length 9 m, are found to have the same resistance. Their diameters are in the ratio

Answer the following question in one word- Name that alloy which is used for making electrical devices?

Two spheres of the same radii, one solid and other hollow are charged to the same potential, which one has greater charge?