Ed-1 Back EMF Due to Current of Self Induction
Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011
To light a fluorescent tube using a 9V battery and an inductor.
- Circuit on board
- Fluorescent tube
- 9V battery
Click on pictures to enlarge.
The switch is closed allowing current to flow through the inductor. On opening the switch the back EMF is large enough to momentarily light the fluorescent tube.