PHYS 3 Chapter Notes - Chapter 25.4-25.6: Electromotive Force, Internal Resistance, Ammeter
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Source of emf = a circuit device that provides emf. Not a force, but an energy-per-unit-charge quantity must be the same at the end of the round trip as at the beginning. Electromotive force (emf) = the influence that makes current flow from lower to higher potential. There are parts of the circuit where the potential energy increases and parts where it decreases. Complete circuit = a path that forms a closed loop that allows a conductor to have a steady current. There is no steady motion of charge in an incomplete circuit. If a charge goes around a complete circuit and returns to its starting point, the potential energy. Equation 25. 13-25. 14: for an ideal source of emf: Internal resistance = the resistance that a charge encounters when it moves through the. Equation 25. 15: terminal voltage, source with internal resistance: Is the emf of the source, is the current through the source, is the internal resistance of.
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