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

Question

Philoid · Accepted Answer

As the length of the wires are the same so the resistances will depend only upon the cross sectional area.

So,

So, the resistance of the combination =