Thomson’s jumping ring experiment is conducted using a low voltage (24 V) electronic circuit. A coil
( L ) is connected with a capacitor ( C ) in parallel and is driven at its resonant frequency to
obtain a high current in the coil. A circuit sends current pulses to the LC tank circuit at around
its resonant frequency. The oscillating current in the coil induces a voltage in a copper-loop on
top of it. The induced current interacts with the radial part of the coil-magnetic field; the
resulting force levitates the loop. In a separate coil, a ferrite core and a copper ring are used to
demonstrate the jumping-ring effect. The levitation and the jumping effect can be controlled by
changing the duty cycle and frequency. In this report simple formulae and approximations are used to
calculate the levitating force on the loop.