What is the electromotive force EMF of a cell?

The emf of a cell is the sum of the electric potential differences (PDs) produced by a separation of charges (electrons or ions) that can occur at each phase boundary (or interface) in the cell. The magnitude of each PD depends on the chemical nature of the two contacting phases.

How is EMF defined in a cell?

The electromotive force of a cell or EMF of a cell is the maximum potential difference between two electrodes of a cell. It can also be defined as the net voltage between the oxidation and reduction half-reactions. The EMF of a cell is mainly used to determine whether an electrochemical cell is galvanic or not.

What is electromotive force state its SI unit?

Electromotive force or e.m.f is defined as the battery’s energy per Coulomb of charge passing through it. like other measures of energy per charge emf has SI unit of volts , equivalent to joules per coulomb.

Which is the best definition of electromotive force?

Electromotive force is defined as the electric potential produced by either electrochemical cell or by changing the magnetic field. EMF is the commonly used acronym for electromotive force. Generator or a battery is used for the conversion of energy from one form to another.

Which is the SI unit for electromotive force?

Updated March 08, 2017. Electromotive Force Definition: Electromotive force is the electric potential generated by either a electrochemical cell or a changing magnetic field. Electromotive force is commonly denoted by the acronym emf, EMF or a cursive letter E. The SI unit for electromotive force is the volt.

Is the potential difference of an electromotive force constant?

EMF is defined as the work done on a unit charge. Potential difference is defined as the energy which is dissipated as the unit charge pass through the components. EMF remains constant. Potential difference is not constant. EMF is independent of circuit resistance.

How is the intensity of the electromotive force measured?

Electromotive force, abbreviated emf (denoted E {\\displaystyle {\\mathcal {E}}} and measured in volts), is the electrical intensity or “pressure” developed by a source of electrical energy such as a battery or generator.