You have 4 PV panels that each have the same I-V curve (Isc = 1 A, Voc = 20 V). %3D (a) How many connection configurations that use all four panels are possible? Draw each one. (b) Draw the I-V curves for each of the configurations on one graph. You may draw the curves by hand or use a software of your choice. Clearly label each curve. (c) Assume you are to power a 10 N load with the panels. Knowing that dimmer sunlight reduces the current output of the cells but not the output voltage, what configuration would be best if you were to build it? Explain your answer.

2. A bank of nickel-cadmium cells is used as the emergency lighting supply for a hospital. There are 100 cells connected in series and each has an A-hr rating of 120 A-hr. The bank has to be replaced, and the manufacturer is no longer supplying nickel-cadmium cells. It is decided to replace the cells with lead-acid cells. How many lead-acid cells will be required if each has an A-hr rating of 60 A-hr, and how should they be connected?

In a series circuit, certain general rules may be stated with regard to quantities of voltage, current, resistance, and power. Express these rules, using your own words: "In a series circuit, voltage..." "In a series circuit, current..." "In a series circuit, resistance..." "In a series circuit, power..." For each of these rules, explain why it is true.

3. Find the equivalent resistance seen between the indicated nodes, in terms of R. The resistors that are in parallel let them be indicated as ()//() without making the complete calculation. a) Between nodes A and B. b) Between nodes F and G. c) Between nodes B AND E. d) Between nodes D AND F.