Question

what would be the effect of resistance of metal wire if?
a increasing its length. b increasing its diameter​

Answer 1

Explanation:

(a)If you increase the length of metallic wire, it's resistance gets increased

(b) if you increase it's diameter, it's resistance decreases as it's cross sectional area will get increased

Answer 2

Answer:

Explanation:

(a) From the above equation, it is clear that resistance is directly proportional to the length. So, if the length is increased the resistance of the metal wire will increase too.

(b) When you increase the diameter of the metal wire, the area of cross-section increases resulting into decreasing the resistance of the metal wire.