JEE Main 2024 Physics question
The radius (r), length () and resistance (R) of a metal wire was measured in the laboratory as r = (0.35 ± 0.05) cm, R = (100 ± 10) ohm, = (15 ± 0.2) cm. The percentage error in resistivity of the material of the wire is:
Answer: (B)
Solution
: error = 10% + 2(14.29%) + 1.33% ≈ 39.9%.