Verified Solution • 2025–26 Session
moderate
QAIPMT-2008-Ph-2258: NEET 2008 Physics - Class 12 AIPMT-2008-Ph-2258 Solution: A wire of a certain material is stretched slowly by ten…
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively
Multiple Choice Options
- A both remain the same
- B 1.1 times, 1.1 times
- C 1.2 times, 1.1 times
- D 1.21 times, same
Step-by-Step Verified Solution
_ l l = 0.1 _ l = 1.1
but the area also decreases by 0.1.
mass = _ l A = V _ , ln _ l + ln _ A = ln mass.
_ _ l l + _ A A = 0 _ _ l l = _ _ A A
Length increases by 0.1, resistance increases, area decreases by 0.1, then also resistance will increase. Total increase in resistance is approximately 1.2 times, due to increase in length and decrease in area. But specific resistance does not change.