A=29 B=39 0=139 D=12 Will be graded: 1. a. What is the equivalent capacitance of the combination shown below by using C1=C2 = C4=D LF, C3=Cs=C6= D/2 UF? Explain starting to end which ones are series or parallel to which one step by step. (20 Points) b. Calculate the charge O stored in the circuit if it is connected to 12 V battery in two open terminals? (20 Points) c. Calculate the total energy stored in the capacitor? (15 Points) d. If a = D cm, b = C cm, q = B nC, and Q =D nC in the figure, what is the potential difference VA - VB? (20 Points) Do for practice and earn (25 points) for completion: 2. Calculate the electric potential on q for the given system below, If Q = D UC , q = D/2 JC, and L = D cm (1 JC =1 x 106 C), Dr. Hetti PHY 156 3. If q1= B nC, q2=-B/5 nC, q3= D nC are sitting at corners of the equilateral of side length D cm, What is the electrical potential at point at the center? What is the potential energy of the system? 4. 50 electrons are distributed on circumference of the circle of radius R= D cm. What is the electric potential at the center? What is the electric field at center? Now if you add an extra 50 protons and equally distribute one after the electron, what will be the answers? 5. A capacitor, C, is (fully) charged by connecting it to a D Volt EMF and then is allowed to discharge through a 2 2 resistor as shown in the Figure. What is the current, I, in the circuit (in A) when the stored energy in the capacitor has dropped to 30% of its initial value? R = 20