PC Cell Efficiency: Find Power (in W)

In summary, PC cell efficiency is the measure of a solar cell's ability to convert sunlight into electricity. It is important because it affects the performance and output of solar panels and can be improved through advancements in technology and regular maintenance. It is calculated by dividing the maximum power output of the cell by the total amount of solar energy and is influenced by factors such as PV material, design, and external conditions.
  • #1
rosie_burk
4
0

Homework Statement


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.


Homework Equations



=(intensity)(area)

The Attempt at a Solution


80*10^-2 *.07 * 800 = 44.8

but the back of the books says the answer is .45
 
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  • #2
1 cm = 10-2 m

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

Cheers.
 
  • #3
, am I doing something wrong?

Your calculation is correct, but you have an extra zero in your answer. The correct answer is 44.8 W, not 448 W. This could be a typo in the book or a rounding error. It's always a good idea to double check your units and make sure they are consistent throughout your calculation. In this case, all the units are in SI units, so there shouldn't be any issues with unit conversions.
 

What is PC cell efficiency?

PC cell efficiency refers to the ability of a photovoltaic (PV) cell, also known as a solar cell, to convert sunlight into electricity. It is a measure of how much of the incoming solar energy is converted into usable electrical energy.

Why is PC cell efficiency important?

PC cell efficiency is important because it directly affects the performance and output of a solar panel. The higher the efficiency, the more electricity can be generated from the same amount of sunlight, making solar energy more cost-effective and environmentally friendly.

How is PC cell efficiency calculated?

PC cell efficiency is calculated by dividing the maximum power output of the solar cell by the total amount of solar energy (in watts) that falls on the cell. The result is then multiplied by 100 to get a percentage value.

What factors affect PC cell efficiency?

There are several factors that can affect PC cell efficiency, including the type of PV material used, the quality and purity of the material, the design of the cell, and external factors such as temperature and shading.

Can PC cell efficiency be improved?

Yes, PC cell efficiency can be improved through advancements in technology and research. Scientists are continually working to develop new materials and designs that can increase the efficiency of solar cells. Additionally, regular maintenance and cleaning of solar panels can also help improve their efficiency.

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