Which of the following statements does NOT correctly describe properties of the

Question

Which of the following statements does NOT correctly describe properties of the solar cell current-voltage graph? a. The intersection of the curve with the y-axis on the left is called the short circuit current, b. The point where the curve intersects with x-axis is called the open circuit voltage, c. The short circuit current increases as the irradiance increases. d. The ratio between the product of current and voltage at maximum power and the product of short circuit current and open circuit voltage is called the fill factor. e. A typical silicon solar cell has the open circuit voltage of around 1.1 V. None of these.

Explanation / Answer

a) The intersection of the curve with the y-axis on the left is called the short circuit current.

This is correct statement.intersection of the curve with the y-axis on the left is maximum current produced by solar cell and is called as short circuit current.

b)The point where the curve intersects with x-axis is called the open circuit voltage.

This is correct statement.intersection of the curve with the x-axis maximum voltage produced by solar cell and is called as open circuit voltage.

c) The short circuit current increases as the irradiance increases.

This is correct statement.The short circuit current is directly proportional to irradiance.

d)The ratio between the product of current and voltage at maximum power and the product of short circuit current and open circuit voltage is called the fill factor.

This is correct statement.The fill factor is the ratio between the maximum power solar cell can produce under normal operating condition and the product of open circuit voltage times short circuit current.Typical values of fill factor are between 0.7 to 0.8

e) A typical silicon solar cell has open circuit voltage of 1.1 V

This is correct statement.Silicon solar cell has open circuit votage in the range of 0.730 V (high quality single crystalline) to 0.6 V (multi crystalline)

Hence statement e does not correctly descibe the properties of the solar cell current voltage graph.

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