October 11, 2025
VCU STEM Building
America/New_York timezone
See you all at the Joint meeting of the Chseapeake, Southeastern PA, and NJ sections of the AAPT, April 18, 2026 @ U of Delaware

Parallel LR Circuits

Oct 11, 2025, 10:00 AM
15m
VCU STEM Building

VCU STEM Building

817 W Franklin St, Richmond, VA 23220
Talk (15 min) 112

Speaker

Carl Mungan (U.S. Naval Academy)

Description

Some variations of connecting two inductors in parallel with a battery (along with some current-limiting resistors) will be discussed [1-2]. A switch is used to power the circuit up or down. Interesting aspects of the behavior of the circuits include a response that cannot described by a single exponential, and a contradiction with Kirchhoff's laws if all circuit elements are assumed to be ideal.
[1] C.E. Mungan, "Double-exponential LR circuit," Physics Teacher 43, 519-523 (November 2005).
[2] C.E. Mungan and J.S. Helton, "A surprising two-inductor circuit," Physics Education 59, 023005:1-4 (March 2024).

Primary author

Carl Mungan (U.S. Naval Academy)

Presentation materials