Question

please explain this question and also answer ​

Answer 1

Explanation:

LOGICAL APPROPRIATE.

simple login is that to keep some unchange we must keep all the things in same ratio.

So, as the length is twiced to keep the Residents same Area of Cross-section must be twice.

THEORETICAL APPROACHES

Resistance is directly proportional to the length of the wire, and inversely proportional to the cross sectional area of the wire. Doubling the length will double the resistance, but the wire also must get thinner as it is stretched, because it will contain the same amount of metal in twice the length.

So to keep the Residents of the conductor same are is also doubled.

so,answer is option C

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