Question

How do the resistance of a conductor changes when its :
i. Length gets half;
ii. Radius of wire is doubled.​

Answer 1

Answer:

Here, length of the wire is directly proportional, so the resistance is half

Here, Resistance of a wire is inversely proportional to the area of cross-section.

So, when we double the radius, it will increase the cross-section of the wire four-times.