11. Give the equations used to calculate current potential difference (voltage)and resistance.

The equations used to calculate current, potential difference (voltage), and resistance are collectively known as Ohm's Law.<br /><br />* **Potential Difference (Voltage):** V = I * R (Voltage equals current multiplied by resistance)<br /><br />This equation shows that the voltage across a resistor is directly proportional to the current flowing through it and the resistance of the resistor. If you increase the current or the resistance, the voltage increases proportionally.<br />