NTA Abhyas JEE Main2020PhysicsUnits and DimensionsPractice
A wire has a mass 0.3 ± 0.003 g , radius 0.5 ± 0.005 m m and length 6 ± 0.06 c m . The maximum percentage error in the measurement of its density is
Options
- A1
- B2
- C3
- D4
Correct answer
D. 4
Step-by-step solution
Density ρ = m π r 2 L ∴ ∆ ρ ρ × 100 = ∆ m m + 2 ∆ r r + ∆ L L × 100 After substituting the values we get the maximum percentage error in density = 4%