Ed-1 Back EMF Due to Current of Self Induction

Aim

To light a fluorescent tube using a 9V battery and an inductor.

Apparatus

  • Circuit on board
  • Fluorescent tube
  • 9V battery

Back EMF 1 Back EMF 2

Back EMF Apparatus and Circuit.

Description

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.

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