1. The problem statement, all variables and given/known data Hello, guys! Here I am again asking for your help...This is question number 2 from http://www.studyjapan.go.jp/en/toj/pdf/007.pdf 2) Consider the circuit shown in Fig. 5, consisting of a battery of voltage E, a switch S, and a parallel-plate capacitor with capacitance C. The capacitor consists of two parallel conducting plates of equal area A separated by a distance d. After the switch S is closed and the capacitor is fully charged, a conducting plate of thickness d/3 and area A is inserted slowly between the plates of the capacitor. The inserted conducting plate is kept parallel to the conducting plates of the capacitor. Select answers to the questions from (a) to (z) below, and write the symbol of the answer in the box. (1) Find the capacitance of the capacitor after the conducting plate is inserted. (2) How much is the increase in the charge stored in the capacitor caused by inserting the conducting plate? (3) How much is the increase in the energy stored in the capacitor caused by inserting the conducting plate? (4) How much work is done by the battery during the insertion of the conducting plate? (5) How much work is done by the force applied to the conducting plate during its insertion? Next, the switch S is opened, and the conducting plate is removed slowly. How much work is done by the force applied to the conducting plate to remove it? 2. Relevant equations C=Q/V U=q²/2C C=[tex]\epsilon[/tex]0A/d 3. The attempt at a solution Actually, I haven't done much 'cause I don't know what to do. Any ideas? Sorry about not posting anything at the "attempt" section, but I really don't know how to start...I tried, I swear! Actually, I tried a lot >< Thanks for the help, guys!