Biot-Savart Law with Compass

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Biot-Savart Law with Compass

A wire wrapped around a compass connected to a battery

PIRA 5H15.14

To show that electric currents produce magnetic fields, wrap eight or more loops of insulated wire around a clear compass. A D-cell battery provides more than enough current to completely flip the compass needle around. Show this on an overhead projector so a large class can see.