Question

A 2 resistance wie is doubled on it calculate the new resistance of the wire​

Answer 1

Answer:

We consider wire is doubled on it means to fold the length of wire. It means its length will get half and area of cross section will get doubled. Thus, R' = p' l'/A' = p (l /2) ÷ 2A = !/4 (p l / A) = 1/4R = 1/4 × 4 = 1Ω

Explanation:

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Answer 2

When you double a wire on itself, you double area, and decrease the length by 1/2 of its original length.

Using Formula —

R' = p' l'/A'

= p (l /2) ÷ 2A

= !/4 (p l / A)

= 1/4R

= 1/4 × 4 = 1Ω