Two 8.0mm×8.0mm electrodes with a0.10-mm-thick sheet of Mylar between them are attached to a 9.0V battery. Without disconnecting the battery, the Mylar is withdrawn. (Very small spacers keep the electrode separation unchanged.) Dielectric constant for Mylar is ?Mylar=3.1.
A) What is the charge before and after the Mylar is withdrawn?
B) What is the electric field before and after the Mylar is withdrawn?