Lecture Demonstrations Laboratory

The Demonstrations Manual

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Electrostatics
Electric Fields And Potential
Capacitance
Current and Resistance
Electromotive Force And Current
DC Circuits
Magnetic Materials
Magnetism: Magnet collection; Magnetic Fields 1; Magnetic Fields 2; Magnetic Fields Associated with Current Carrying Wires 1; Magnetic Fields Associated with Current Carrying Wires 2; Solenoid with a Iron core; Magnetic Deflection of an Electron Beam; Magnetohydrodynamic Motor; Forces Between Current Carrying Wires; Vibrating Lamp Filament (Lorenz Force Demonstrator); Force on a Current Carrying Wire in a Magnetic Field; Hall Effect; Galvanometer Movement
Inductance
Induction
Complex Circuits
Semiconductors And Tubes
Transmission Lines and Antennas

Force on a Current Carrying Wire in a Magnetic Field

Purpose:

An illustration of the force exerted by a magnetic field on the moving charges in a current carrying wire.

Procedure:

Hang a single wire between the stands such that it passes between the poles of the horseshoe magnet at its lowest point. Connect the switch to the battery and to the base of the pole to which the hanging wire is attached. Depending on the orientation of the magnet and the direction of the curren flow in the wire, when the switch is thrown the wire will either jump away from the magnet or be "sucked" into it.

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Equipment:

12 V Car Battery
Force Between Wires Apparatus
Large Horseshoe Magnet