Racing Rings consists of three rods one each of copper, aluminum and PVC, Ring magnet is dropped down the PVC rod, it falls unobstructed, Two metal rods create an induced magnetic field to that adds resistance to the rings travel, metals are different, they fall at different rates
Voltage Probe, This sensor is used to measure voltages in the range of -30 to +30 voltsUse this sensor in experiments that involve voltages larger than 10 volts, such as when working with large solar panels. Since this voltage probe covers