A) 6.67 ohms
B) 60.0 ohms
C) 120 ohms
D) 180.0 ohms
Correct Answer: D
Solution :
In case of stretching of wire \[R\propto {{l}^{2}}\] \[\Rightarrow \] If length becomes 3 times so Resistance becomes 9 times i.e. \[R'=9\times 20=180\Omega\]You need to login to perform this action.
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