Two pendula, each consisting of magnets suspended inside vertical coils, are interconnected. When one pendulum is set into oscillation, the magnetic flux changes in its coil, inducing a current that flows through the second coil. This current generates a magnetic field in the second coil, which exerts a force on the magnet in the second pendulum, causing it to oscillate as well. This setup demonstrates the coupling of mechanical and electromagnetic oscillations through mutual induction.