A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has a radius of 12.5cm , and the outer sphere has a radius of 15.1 cm. A potential difference of 120 V is applied to the capacitor.
A) What is the magnitude of the electric field at radius 12.8 cm, just outside the inner sphere?
B) What is the magnitude of at 14.7 cm, just inside the outer sphere?