Physics Electromotive Force and Ohm's Law Quiz

Electromotive force (emf) is the energy provided per unit charge by a battery or generator. It drives the flow of current through a circuit.

Electrical current is the flow of electric charge, typically measured in amperes (A). It represents the rate at which charge is flowing through a conductor.

Potential difference, or voltage, is the difference in electric potential between two points in a circuit that drives current flow. It is directly related to the amount of work done to move a charge.

<p>Ohm's law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points. It is mathematically expressed as $V = IR$, where $V$ is voltage, $I$ is current, and $R$ is resistance.</p> Signup and view all the answers

<p>According to Ohm's law, the potential difference (voltage) across a resistance is equal to the electromotive force (emf) minus the voltage drop across the resistance, which determines the current flow. Mathematically, it can be stated as $V = EMF - I imes R$.</p> Signup and view all the answers