Two different wires have specific resistivities, lengths,a re of cross-sections are in the ratio `3:4, 2:9` and `8:27` then the ratio of resistance of two wires is

The specific resistance per unit area of cross section of a wire is equivalent to –

Two wires of the same metal have same length, but their cross-sections are in the ratio 3:1 . They are joined in series. The resistance of thicker wire is 10 Omega . The total resistance of the combination will be

Two wires of the same metal have the same length, but their cross-sections are in the ratio of 3:1 . They are joined in series. The resistance of the thicker wire is 10 Omega . The total resistance of the combinations will be

Two wires X,Y have the same resistivity, but their cross-sectional areas are in the ratio 2 : 3 and lengths in the ratio 1 : 2 . They are first connected in series and then in parallel to a.d.c. source. Find out the ratio of drift speeds of the electrons in the two wires for the two cases.

Two wires of same metal have the same length but their cross- sections are in the ratio 1 :3 . They are joined in series. The resistance of the thicker wire is 10 Omega . The total resistance of the combination will be

Two wire of the same meta have same length, but their cross-sections are in the rati 3:1 . They are joined in series. The resistance of thicker wire is 10Omega . The total resistance of the combination will be