Verified Solution • 2025–26 Session
moderate
QNEET-2017-Ph-1007: NEET 2017 Physics - Class 12 NEET-2017-Ph-1007 Solution: The resistance of a wire is 'R' ohm. If it is melted and…
The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length. its new resistance will be
Multiple Choice Options
- A n R _
- B n 2 R
- C n 2 R _
- D nR
Step-by-Step Verified Solution
Resistance R = _ l / A
l _ = n l and A _ = A n , R _ = _ l A _
R _ = _ n l A / n = _ l A n 2
R _ = R n 2