Question
(a) What is the internal resistance of a voltage source if its terminal voltage drops by 2.00 V when the current supplied increases by 5.00 A? (b) Can the emf of the voltage source be found with the information supplied?
1. $0.400 \Omega$
2. No, the EMF can not be determined. We are given 4 equations, but we have 5 unknowns, so the system of equations can not be solved completely. A system of equations always needs as many equations as unknowns in order to solve it completely.
Solution Video