48. A wafer of titanium dioxide (K=173) of area 1.00 cm2 has
a thickness of 0.100 mm. Aluminum is evaporated on the
parallel faces to form a parallel-plate capacitor. (a) Calculate
the capacitance. (b) When the capacitor is charged
with a 12.0-V battery, what is the magnitude of charge delivered
to each plate? (c) For the situation in part (b),
what are the free and induced surface charge densities?
(d) What is the magnitude of the electric field?