what is emf in electricity ?
what is potential difference of a cell?
are they same??
Answers
Electromotive force (EMF) is equal to the terminal potential difference when no current flows. EMF and terminal potential difference (V) are both measured in volts, however they are not the same thing. EMF (ϵ) is the amount of energy (E) provided by the battery to each coulomb of charge (Q) passing through.
The measure of the potential difference between two half cells in an electrochemical cell is known as cell potential. The potential difference is caused by the ability of electrons to flow from one half cell to the other. The anatomy of an electrochemical cell is given below in the image.
Answer:
Electromotive force (EMF) is equal to the terminal potential difference when no current flows. EMF and terminal potential difference (V) are both measured in volts, however they are not the same thing. EMF (ϵ) is the amount of energy (E) provided by the battery to each coulomb of charge (Q) passing through.
SOME DIFFERENCES BETWEEN EMF AND POTENTIAL DIFFERENCE ARE AS FOLLOWS:
- EMF is independent of the resistance of a circuit, whereas PD is proportional to the resistance between the given points.
- Voltage developed by an electrical source is called electromotive force, whereas the observed difference in voltage in any two points in an open circuit is called potential difference.
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