How does an ideal power supply affect the voltage when the current demand increases?

An ideal power supply is characterized by its ability to maintain a constant voltage regardless of the load placed on it, which includes fluctuations in current demand. When the current demand increases, the ideal power supply provides the same voltage output as it is designed to do so without any drop or fluctuation. This is a fundamental aspect of how an ideal power supply operates, as it can supply all the required current while keeping the voltage stable.

In real-world scenarios, non-ideal power supplies may experience voltage drops when the current increases due to internal resistance or limitations in their design, but this question specifically addresses an ideal power supply, which does not exhibit such behavior. Therefore, the correct answer reflects the definition of an ideal power supply as maintaining a constant voltage output.