Why is a circuit with a resistor and inductor called an RL circuit and not an RI circuit?

Was there a now-obsolete name for an inductor that started with the letter $L$?

  • $\begingroup$ We don't use m for momentum but we use p $\endgroup$
    – user227513
    Apr 7, 2019 at 16:17
  • $\begingroup$ I'm voting to close this question as off-topic because it doesn't contain a single gram of actual physics. $\endgroup$
    – Qmechanic
    Apr 7, 2019 at 16:18

1 Answer 1


Quoted from Wikipedia: Inductance:

It is customary to use the symbol $L$ for inductance, in honour of the physicist Heinrich Lenz.


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