Question

A wire of resistance 12 ohm is elongated to double its length find the new released

Answer 1

⭐⭐⭐ Hey mate!!⭐⭐⭐

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⚡⚡In case of stretching volume remains constant.

❄️Volume = A x l

If l' =nl

Then,

Area = A' = A/n

❄️New residence = R = rho n l÷ A/n

❄️R= rho n^2l/A

⚡⚡R'= n^2R

❄️Now, if n =2l

❄️R'= 4R

❄️R' = 4×12 = 48ohm

Hope it will help you...✌️✌️

#phoenix⭐