Question

the length of the wire of resistance 2 ohms is doubled with changing its area of cross section what will be the new resistance of the wire ? what will happen to the resistance if wire is put into boiling water​

Answer 1

Answer:

But resistance is also inversely proportional to the area of cross-section, and as area of cross-section is halved due to doubling of length, the resistance is once more doubled due to the halfing of the area of cross-section. So overall the resistance of the wire becomes four times the original resistance

Explanation:

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