Which variable in Ohm’s Law represents current?

In Ohm’s Law, the variable that represents current is denoted by the letter I. This fundamental relationship in electrical theory describes how current (I) flows through a conductor when a voltage (E) is applied across it, taking into account the resistance (R) that opposes this flow. The law itself can be expressed with the formula I = E/R, indicating that current is equal to voltage divided by resistance.

Understanding this concept is essential in the field of fire alarm systems, as current plays a crucial role in the operation of devices such as smoke detectors, alarms, and control panels. Recognizing how different factors affect current can help in troubleshooting and ensuring that the fire alarm systems operate reliably during emergencies.