Elec Class
learn electricity hands-on
Solved exercise · level 2 of 5
Skills: Analyse
Cell E1 has an EMF of 1.5 V and an internal resistance r = 0.5 Ω; it feeds R1 = 3.9 Ω.
What will A1 and V1 read? Answer with the current.
Parametric exercise: the values change with every draw; these are one example.
I = E / (R + r) = 341 mA; V1 reads U = E − r·I = 1.33 V, less than E.