A capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has radius $10\mathrm{.}5$ cm$,$ and the outer sphere has radius $16\mathrm{.}5$ cm$.$ A potential difference of $150\mathrm{.}0$ V is applied to the capacitor. What is the energy density at r $=16\mathrm{.}4$ cm$,$ just inside the outer sphere? For a parallel$-$plate capacitor the energy density is uniform in the region between the plates, except near the edges of the plates. Is this also true for a spherical capacitor?