B5 practical: EMF and internal resistance example results
The data for all parts of the experiment was collected in one table. The uncertainties were estimated from the smallest division of the scale.The uncertainty in 1/I was found from (1/Imin - 1/Imax)/2 The equation for this line is R = ε/I - r so the gradient = ε = 1.39 ± 0.03 VThe intercept is -r = 0.35 ± 0.14 Ω This line has the equation V = -Ir + ε so gradient = -r = -0.44 ± 0.02 ΩThe intercept = ε = 1.305 ± 0.005 V...