Circuits Problem 9.5.6

Connect Battery   Disconnect Battery
 

Description

The circuit with a battery, an inductor and a 20 Ohm-resistor can have a battery connected or disconnected depending on which switch is open. The battery is initially connected (switch 1 is closed and switch 2 is open) and then the battery is disconnected and the system evolves in time. You may look at the current from the graph after the switch 2 is closed and switch 1 is open. 

Question

 What is the inductance of the inductor?

Answer

 12 mH.

Reference

See Giancoli-PA: 21-12, Giancoli-SE: 30-4.

Credits

Physlet problem authored by Mario Belloni.

2000 by Prentice-Hall, Inc. A Pearson Company