How does electrical work depend on voltage and current?

Electrical work ($W$) is the energy released in the circuit (e.g., converted into light and heat by the bulb). It is calculated using the formula:
W = U · I · t

• If you increase the voltage ($U$): the work increases directly proportionally. This means the electric field does more work pushing each charged particle through the conductor.
• If you increase the current ($I$): the work also increases proportionally. A higher current means more electrons pass through the conductor per second.

Conclusion: When current or voltage increases, electrical power (P = U · I) grows, the bulb shines brighter, and the work done by electricity increases rapidly over time.