Question

If length of a metallic wire becomes n times,
its resistance becomes
(a)
${n}^{2}$ times

(b)
$\sqrt{n}$times

(c)
$\frac{1}{ \sqrt{n} }$
times

(d)
$\frac{1}{ {n}^{4} }$
times
​

Answer 1

Answer:

ANSWER IS D

I HOPE IT WILL HELP YOU

Answer 2

Explanation:

As the resistance of the wire is directly proportional to the length but inversely proportional to cross sectional area thus resistance increases by 10% as the length increases but as the area decreases by 10 % then again the resistance increased by 10 % .