Field of a toroid.

D7-4 Field of a toroid.
Purpose: To demonstrate force and field from current.
Description: A toroidal winding of heavy wire is made through a horizontal plexiglas sheet. When current is flowing through the toroid, iron filings are sprinkled onto the sheet. The field exists only inside the toroid.
References: El-11.
Equipment: Toroid on a sheet of plexiglass, iron filing and DC power supply.

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