Problem 26.75 9 of 12 Constants Periodic Table Part A A solar cell, 3.2 cm squar

Question

Problem 26.75 9 of 12 Constants Periodic Table Part A A solar cell, 3.2 cm square, has an output of 330 mA at 0.76 V when exposed to full sunlight. A solar panel that delivers close to 1.3 A of current at an emf of 134 V to an external load is needed. How many cells will you need to create the panel? Give your answer as an integer. cells Submit Request Answer Part B How big a panel will you need? how should you connect the cells to one another? Express your answer using two significant figures. Submit Request Answer

Explanation / Answer

P_cell = V I = (0.76 V) (0.330 A)

P_cell = 0.2508 W

P_needed = (1.3)(134) = 174.2 W

(A) n = P_needed / P_cell = 695 ....Ans

(B) A_cell = (0.032 m)^2

for panel, A = n A_cell

= (695)(0.032^2)

= 0.71 m^2

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