Moving the slider from Y to X alters the potential difference across the lamps by changing the resistance in the circuit. As the slider is adjusted, the current will favor the path with lower resistance, affecting how voltage is distributed. This results in a variation of potential difference across each lamp, depending on their respective resistances. The relationship between voltage, current, and resistance is governed by Ohm's Law, which is crucial for understanding these changes. Ultimately, the potential difference across the lamps will vary as the slider position changes, demonstrating the principles of electrical circuits.
