Homework Solution

TP 12-3

Given:

output: 3 V and 0.1 A

area: 5 cm by 8 cm

P = 40 W

Find:

area required for array

Science:

P = I V

Solve:

for a single cell:

P_cell = (0.1 A)(3 V) = 0.3 W

number of cells required:

N = (40 W) / (0.3 W/ cell) = 133.33 cells

required area:

A = N A_cell

= (133.33) ( 5 cm) (8 cm)

= 5333 cm² = 0.533 m²

A = 71.1 m²