Prepare the circuit based on the attached connection diagram. The strong rod magnet moved across the coil induces alternating-current voltage. Which two of the diodes will get the opening voltage in the given circuitry, depends on the direction of the induced voltage. Those diodes will light up in this circuitry, for which the actual voltage has an opening direction in the given quarter period of the movement of the rod magnet. Subject to the direction of voltage, the two red or two green LEDs illuminate alternatingly.

Implements required for the experiment

– 2 red LEDs
– 2 green LEDs
– Wires
– Switchboard
– 8600 windings coil
– Strong rod magnet
– Support

Practical application of the Graetz-circuitry: operating a motor by diode based rectification.