What is limiting current?

Answer 1

In a reactor where electrochemistry is being conducted and electron exchange is taking place, the ions around a given electrode will permit a rapid initial electron current. But what happens after a few moments and the initial "rush" to the electrode is over? It's the ability of ions to diffuse through the electrolyte and get next to the electrode to continue the reaction that will govern the rate at which it preceeds. That sets the limiting current. Limiting current is the current flowing "out" or "in" an electrode in a reactor after the reaction begins and ion mobility takes control of the rate or speed of the reaction.

Answer 2

Current limiting is what we do to prevent "runaway" current in a circuit. The current limiting component or components act to prevent "overcurrent" in a given situation. There are a number of examples, so let's pick one or two. On the repair bench of a technician, there might be a variable voltage power supply to permit the testing of stuff. Some of these supplies have built in current limiting. The technician can set an appropriate amount of current, and if "something goes wrong" in a test, the power supply's current limiting circuit crowbars the power off at the preset limit. A fuse or circuit breaker is a current limiting device. About the only difference is that the latter can be reset, while the former must be replaced.

Answer 3

Limiting current refers to the maximum current that a circuit or device can handle without being damaged or operating improperly. It is usually specified in the device's datasheet or by the manufacturer to ensure safe operation and prevent overheating or other potential issues. Implementing current-limiting mechanisms like resistors or fuses can help protect the circuit from exceeding its maximum current rating.