Homework Solution

TP 12-1

Given:

solar cell with output @ 2 A and 0.5 V costs $30

Find:

cost per peak kilowatt

Science:

P = I V

Solve:

for a single cell:

P_cell = (2A)(0.5 V) = 1 W

number of cells required for 1 kW:

N = (1 kW) / (1 W/cell) = 1000 cells

cost for 1000 cells:

cost = ($ 30/cell) (1000 cells) = $ 30,000_ANS