SP212‐Spring‐2016 CH‐25‐B Assignment First do the following Wiley‐Plus assignment: Assignment #25b After completing the Wiley‐Plus, in your homework notebook, complete the following problems: CH25 Questions #7, 9, and 10 CH25 Problems # 29, 33, and 43 To check your work, the answers to the odd problems are in the back of the book. The answers to the even problems are: No even #’s assigned Homework Then complete the attached worksheets: (Note: the above problems were designed to ensure you have the skills to solve the worksheet problems. It is imperative to your learning of the problem solving technique to do the above problems BEFORE attempting the worksheet problems. You are graded on both! Homework notebooks are graded.) CH‐25‐B‐1: For each of the equations below, 1) State what each term is in your own words … 2) What the units of each term are… 3) What is the general use of that equation in your own words? A.
UE 
q2 1
 CV 2 2C 2
1
B. u E   0 E 2 2
C.
C   o A d
CH‐25‐B‐2: A parallel‐plate capacitor is fully charged by a 1.5 V battery. The distance between the plates is 1.0 mm and a dielectric of dielectric constant  = 2.0 completely fills the space between the plates. If the capacitor stores 9.7 x 10‐10 J of energy, what is the area of the plates? Show all work:
CH‐25‐B‐3: In the figure the parallel‐plate capacitor of plate area 7.90 × 10–2 m2 is filled with two dielectric slabs, each with thickness 2.60 mm. One slab has dielectric constant 3.30, and the other, 4.70. How much charge does the 1.40 V battery store on the capacitor? Show all work: CH‐25‐B‐4: In the figure below, Assume C1 is 10μF, C2 is 5μF, C3 is 4μF, and the battery is 20V. Capacitor C4 is a parallel‐plate dielectric‐filled capacitor, with an unknown kappa value, and has an area of 40 cm 2 and plate spacing of 1.0 mm . The equivalent capacitance of the entire circuit is 10.833μF. What is the energy density of Capacitor C4? Show all work: