[填空题]
A homemade capacitor is assembled by placing twn-e2qu ; e.a)f-7p 8tspti kudo 9-in. pie pans 5 c. gb-fis 1.x (zc -cnanb)uz9nm apart and connecting them to the opposite terminals of a 9-V battery. Estimate
z u z fbci (-nnsb1x-).9nc.ag (a) the capacitance, $ \times10^{-12 }\,F$
(b) the charge on each plate, $ \times10^{-11 }\,C$
(c) the electric field halfway between the plates, V/m
(d) the work done by the battery to charge the plates. $ \times10^{ -10}\,J$
(e) Which of the above values change if a dielectric is inserted?
