Electromotive force (EMF) is described as a measurement of the energy that causes the current to flow through a circuit. This book presents distinct aspects of Electromotive Force Theory and its operations in engineering science and industry. The topics elucidated in the book are: Quantum Theory of Thermoelectric Power, EMF in solar energy and photocatalysis, Electromotive Force Measurements and Thermodynamic Modelling of electrolyte in mixed solvents, utilization of Electromotive Force Measurement in Nuclear Systems Using Lead Alloys, Electromotive Force Measurements in High-Temperature Systems, Resonance Analysis of Induced EMF on Coils and many more.