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Self Induction


Self Induction

inductor, current Self-induction apparatus is currently missing Updated on 05/30/13


1. To show that as a result of self-induction the growth of current in an inductive circuit is slow. 2. To show that the energy stored in the magnetic field of an inductor appears as a surge of self-induced current when the circuit is broken.


Self-contained self-induction apparatus, 12 V supply


Connect the 12 V supply to the circuit so that the two lamps are supplied in parallel. The left-hand lamp, however, is in series with a low resistance inductor. With switch S2 open and switch S1 closed the left-hand lamp will be seen to light up fractionally behind the right-hand lamp. If S2 is now closed shorting the left-hand lamp out of the circuit then all the energy of the magnetic field of the inductor will be delivered to the right-hand lamp when S1 is opened. Open S1 and the right-hand lamp will be seen to flash momentarily at the break.


Demo room information

Location —-
Maker Unknown
Current State Working
demonstrations/5_electricity_and_magnetism/5j_inductance/self_induction/start.txt · Last modified: 2019/02/14 23:33 (external edit)