Electromotive force and internal resistance Flashcards
1
Q
What is internal resistance?
A
Internal resistance is the resistance within a cell in a circuit.
2
Q
What is EMF?
A
The electromotive force (EMF) of a battery is the amount of electrical energy it porduces and transfers to each coulomb of charge.
It is measures in volts (V).
***not a force***
3
Q
What are the two equations for emf?
A
E = V + Ir
E = I(R+r)
