# Definition of Electro Motive Force

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1. Oct 8, 2014

1. The problem statement, all variables and given/known data
The title.
I am confused with the definition as my text book does not have a good definition for this.
P.S I have my exams tomorrow so I can't ask my teacher now.(Mid night)

2. Relevant equations
$$V=\frac{E}{Q}$$

3. The attempt at a solution
E.M.F is the energy given to each coulomb of charge by the electric source of the circuit.

Here's are the marking points for the answers(From the marking scheme of an exam paper)
"" Marking point 1:Work done per (unit) charge/coulomb/C or energy transformed per (unit) charge/coulomb/C;
Marking point 2: Property of a source(Of electricity) or energy transformed to electrical energy per (unit) charge/coulomb/C;"

Doesn't the two points say the same thing? Is my definition correct for getting two marks? Can you suggest a better definition?

(How do I make quotes? )

2. Oct 8, 2014

### Staff: Mentor

The second introduces a source, which I would not consider as necessary for the definition. "Define X" is always problematic to grade.

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