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• November 16, 2022

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• PHY102 Physics II © Dr.Cem Özdoğan

• 27-6 Power, Potential, and emf

• internal resistance of emf device

• Emf device transfers its energy (stored as chemical) to the charge carrier, so it does work on the charge carriers to establish a current

• The net rate P of energy transfer from the emf device to the charge carriers is given by:

• V: potential across the emf device; Vb-Va

• Pr: rate of energy transfer to the thermal energy within emf device or internal dissipation rate

• Pemf: rate at which emf device transfers energy both to the charge carriers and to the thermal energy (power of emf device)

• Resistor

• Other device