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A current travelling along a wire produces a circular magnetic field around the wire. The magnetic field direction can be determined using the right hand grip rule. |
A soft iron core wrapped in wire. When current flows through the coil of wire it becomes magnetic.
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The movement of the charged particle is a current so it produces a magnetic field. This magnetic field interacts with the permanent magnetic field to create a force. The force is perpendicular to the direction of motion and the permanent magnetic field. |
Motor
Loudspeaker
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Fleming’s left hand rule. Thumb: force First finger: Magnetic Field Second finger: Current |
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If you increase the magnitude of the current through a wire or the size of the magnet being used, you increase the force on the wire. If you change the direction of the current or reverse the poles of the magnet, you change the direction of the force on the wire |
