Question

how will the resistance of a wire changes if its radius is tripled​

Answer 1

Answer:

The resistance of a wire is directly proportional to its length and inversely proportional to its area (or square of inverse of diameter). 1) When the length is tripled then its resistance will also becomes three times. 2) If the diameter get tripled then its resistance becomes one ninth of the initial reistance

Answer 2

Answer:

Resistance decreases by 3 times.

Explanation:

Since R=¶l/πr

So , if the radius is trippled then the resistance decreases by 3 times.