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PC Cell Efficiency

  1. Aug 25, 2009 #1
    1. The problem statement, all variables and given/known data
    A photovoltaic cell has area 80 sq cm and efficiency converting energy in the form of sunlight to electricity of 7%. The sun's intensity is 800 W / sq m and the rays are perpendicular to the cell's surface.
    What power will be produced by this cell (in W)? Take care in converting to SI units.


    2. Relevant equations

    =(intensity)(area)

    3. The attempt at a solution
    80*10^-2 *.07 * 800 = 44.8

    but the back of the books says the answer is .45
     
  2. jcsd
  3. Aug 25, 2009 #2

    kuruman

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    1 cm = 10-2 m

    (1 cm)2 = (10-2 m)2 = ?

    Cheers.
     
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