When radial flow is generated in the rapidly rotating magnetosphere of Jupiter, angular velocity of the magnetospheric plasma departs from the corotational value on account of the conservation of the angular momentum. This causes twisting of magnetic field lines in the magnetosphere and Joule heating in the ionosphere. We have estimated the energy storage and dissipation rates by using a model in which finite transit time of the signals between the equatorial plasma disc and the ionosphere as well as the reflection of the signal at the ionosphere are taken into account. In the case of the inward flow produced by the magnetospheric compression the energy stored in the magnetic field and dissipated in the ionosphere while the compression is in progress both amount to 1017~18J.