Describe an experiment that may be used to investigate the relationship between current and potential difference for a filament lamp

As more charges carrying electrical energy passes through the conductor per unit time, more electrical energy is dissipated. Hence, the potential difference, V across the conductor increases with the current, I that flows through it.

Explanation:

This heats up when an electric current passes through it, and produces light as a result. The resistance of a lamp increases as the temperature of its filament increases. The current flowing through a filament lamp is not directly proportional to the voltage across it.

0.11 m/s and 0.28 m/s should be correct