*1974E2. A parallel-plate capacitor with spacing b and area A is connected to a battery of voltage V as shown above. Initially the space between the plates is empty. Make the following determinations in terms of the given symbols.
a. Determine the electric field between the plates.
b. Determine the charge stored on each capacitor plate.
A copper slab of thickness a is now inserted midway between the plates as shown below.
c. Determine the electric field in the spaces above and below the slab.
d. Determine the ratio of capacitances `Coriginal Cwith copper ` when the slab is inserted