The electric current in a circuit is determined by:
Electrical work is done when an electric current flows through a circuit. We can calculate the current, potential difference or resistance using the equation:
It is not possible to directly change the electric current in a circuit, as the current is dependent on the potential difference and resistance.
Resistance is a measure of the opposition to the flow of current, which is measured in ohms (Ω). As you increase the resistance, the more difficult it is for current to flow through.
Ohm’s law states that current is directly proportional to the potential difference.