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psykatic
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Homework Statement
What is the difference between E.M.F. and Potential Difference of a circuit?
Homework Equations
Both have similar SI unit, that is, Volt (V)
The Attempt at a Solution
I did find out one thing, that emf is the potential difference when there is no current flowing through the circuit or when the key is open. Whereas, the circuit has certain value of potential difference when there is current flowing through the circuit.
But, while I was going through the Chapter Electromagnetic Induction, I found one thing strange. In case of an A.C circuit containing an inductance, we have,
[tex]e=E_o~sin({\omega.t}+{\pi/2})[/tex]
and even, the instantaneous current is given by,
[tex] i=I_o sin({\omega.t)[/tex]
Where does this current come from? How can the circuit have a current flowing through when there is certain value of e.m.f?