If the potential difference across a component in a circuit is measured, how can the electromotive force (EMF) of the component be determined?
A. The EMF can be calculated by adding the potential difference to the current flowing through the component.
B. The EMF is equal to the potential difference measured if the component is ideal and there are no other resistances in the circuit.
C. The EMF can be determined by dividing the potential difference by the resistance of the component.
D. The EMF is obtained by subtracting the potential difference from the total power consumed by the component.