Specifications:
Length: 250mm
Width: 180mm
Height: 122mm
Uses: To prove the existence of a magnetic field around an energized conductor; to verify the magnetic field of a linear current, etc.

Instructions
Place the experimental demonstrator on the table, place the large magnetic needle on the needle tip, and adjust the orientation of the base when the magnetic needle is stationary, making sure that the wire is parallel to the magnetic needle.
Connect the DC 6V power supply, then you can see the magnetic needle swing, indicating that a magnetic field is generated around the current, and the right-hand rule can be used to determine the direction of the magnetic field.
Change the direction of the current and look at the direction of the magnetic needle.