PPE35_ForceOnWires

PPE35_ForceOnWires - Magnetism Force on Wires in an...

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© RHJansen Magnetism Magnetism Force on Wires in an Force on Wires in an External Magnetic Field External Magnetic Field
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Force on Current Carrying Wires Current carrying wires are magnets. If a current carrying wire is running through an external magnetic field (a field caused by another magnet), then the two magnets will interact. The external magnetic field will put a force on the current carrying wire. F B Force on the wire I Current in the wire Length of the wire (only the part of the wire that is in the field) B The magnetic field of the external magnet sin θ Uses the angle between the wire and the magnet field. Requires the perpendicular component. Remember the external magnet is a completely different magnet and is not part of the wire. It pushes on the wire which is a second magnet. © RHJansen F B = I l B sin q λ
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Field of a Wire versus Force on a Wire Previously we found the magnetic field around a current carrying wire using the equation: This field circled the wire, but was difficult to draw on two dimensional paper. One option was to show the wire coming out of or going into the page, and then the field could be seen as circles. The other option was to show the wire on the
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PPE35_ForceOnWires - Magnetism Force on Wires in an...

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