Question

the resistence R=V/I where V=(100+-5)V and I=(10+-0.2)A.Find the percentage error in R.

Answer 1

R = V/i

ΔR/R = ΔV/V + Δi/i
= (5/100) + (0.2/10)
= 0.07

Percentage error in R = 0.07 × 100 = 7%