Ohm's Law and Potentiometer Experiments Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across...
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor. This means that if you increase the voltage, the current will increase, and if you decrease the resistance, the current will decrease.
In an Ohm's law experiment, you can use a multimeter to measure the current and voltage across a conductor, and then plot a graph of these values. By graphing the data, you can determine the resistance of the conductor.
Another common experiment with potentiometers is to connect a variable resistor to a power supply and then vary the voltage at the power supply. The current flowing through the circuit should then be measured. This experiment can be used to demonstrate how the resistance of a conductor changes with voltage, and how the relationship between voltage and current can be described by Ohm's law.
Examples:
When you increase the voltage across a 10-ohm resistor, the current will increase from 1 A to 2 A.
When you decrease the resistance of a 20-ohm resistor, the current will decrease from 2 A to 1 A.
When you increase the voltage across a 100-ohm resistor, the current will increase from 1 A to 2 A, but the power delivered to the resistor will also increase