A) \[12\,\Omega \]
B) \[1.2\,\Omega \]
C) \[13\,\Omega \]
D) \[11\,\Omega \]
Correct Answer: A
Solution :
Since \[R\propto {{l}^{2}}\] Þ If length is increased by 10%, resistance is increases by almost 20% Hence new resistance \[R'=10+20%\]of 10 \[=10+\frac{20}{100}\times 10=12\,\Omega .\]
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