For questions about polarity considerations in electronics due to circuit components with polarity (e.g., diodes, transistors, polarized capacitors, batteries, etc.), polarity of quantities directional quantities (such as currents, voltages, electromagnetic fields, etc.), polarity symbols, etc.
Polarity is often an issue to consider in electronics since polarity is a property of certain electrical quantities (e.g., currents, voltages, electromagnetic fields, etc.) and circuit components (e.g., diodes, transistors, polarized capacitors, batteries, etc.). Correct polarity is often necessary for electronics to properly function, and circuit designers must often add protection for the possibly of incorrect polarity (e.g., batteries installed backwards).
