What is the letter symbol used to denote mutual inductance?

Mutual inductance is a key concept in electromagnetic theory, particularly in the context of circuits involving inductors. The letter symbol used to denote mutual inductance is "M." This symbol represents the capability of one inductor to induce an electromotive force (EMF) in another inductor when the current in the first changes.

Understanding mutual inductance is crucial for engineers and electricians because it plays a significant role in transformers, coupling between coils, and various other applications involving inductors. The letter "M" specifically helps to distinguish mutual inductance from self-inductance, which uses the letter "L."

This differentiation is important, as it aids in analyzing circuits where both self-inductance and mutual inductance are present, allowing for proper calculations and predictions of circuit behavior.