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For investigating the deflection of a current-carrying conductor in a magnetic field, two of these electrodes are used to hold the SE conductor swing with low friction; Angled metal rod, one end with front notch for holding the SE conductor swingMaterial: Brass, nickel-platedRod diameter: 4 mmDimensions: 56 x 40 mmMass: 9 gadditionally required:P3912-2A Electromagnetic swing, SE