What is the total current for a series circuit?

In a series circuit, the key characteristic is that the same electric current flows through all components connected in the circuit. This means that regardless of the number of components present, the current at any point in the circuit remains constant. Therefore, the total current can be expressed as ( I(t) = I(1) = I(2) = I(3) ), and so forth, indicating that the current is equal at all points in the series.

This reflects Ohm’s law and the fundamental principles of series circuits. Voltage may differ across individual components, but the current remains unchanged throughout the series. Understanding this principle is crucial for working with fire alarm systems as it dictates how devices receive and handle power in a series configuration.

In contrast, the other options suggest methods of calculating current that imply varying values at different points or suggest incorrect operations (like addition or multiplication of currents), which do not align with the characteristics of series circuits.