With the power supply off, connect one induction coil to the power supply. Place

Question

With the power supply off, connect one induction coil to the power supply. Place the compass in front of the induction coil so that the face of the coil is Perpendicular to the direction of the compass needle, as shown below: Compass Turn on the power supply to create a current through the coil. Describe what happens to the compass: Turn off the power supply so that there is no longer current through the coil. Describe what happens to the compass Conclusions: Explain why the compass behaves as it does.

Explanation / Answer

The magnetic field produced by an electric current is always oriented perpendicular to the direction of the current flow. Compasses work by pointing along magnetic field lines. If you hold a compass near a wire through which current is flowing, the needle on the compass will be deflected in the direction of the magnetic field B, created by the current flowing through the coil.

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