A wire with 15 
resistance is stretched by one tenth of its original length and kept volume of wire is constant. Then its resistance will be
A
15.18 
B
81.15 Ω Ω
C
51.18 Ω Ω
D
18.15 Ω Ω
Text Solution
Verified by ExpertsThe correct answer is:
D
If the wire is stretched by 
of its original length then the new length of wire become.
…..(i)
As the volume of wire remains constant then 
…..(using (i))
Now the resistance of stretched wire.,
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