Question

The current density of a photo voltaic cell ranges from

• A. $10-20\raisebox{1ex}{$mA$}\!\left/ \!\raisebox{-1ex}{$c{m}^2$}\right.$
• B. $40-50\raisebox{1ex}{$mA$}\!\left/ \!\raisebox{-1ex}{$c{m}^2$}\right.$
• C. $20-40\raisebox{1ex}{$mA$}\!\left/ \!\raisebox{-1ex}{$c{m}^2$}\right.$
• D. $60-100\raisebox{1ex}{$mA$}\!\left/ \!\raisebox{-1ex}{$c{m}^2$}\right.$

Answer 1

The correct option is B

$40-50\raisebox{1ex}{$mA$}\!\left/ \!\raisebox{-1ex}{$c{m}^2$}\right.$

Current density:

1. The current density is defined as that quantity whose magnitude is the electric current per cross-sectional area at a given point in space,
2. It is used in the terminology of photovoltaic cells.
3. In SI units, the current density is measured in amperes per square meter.

Photovoltaic cell:

1. A photovoltaic cell is a type of semiconductor diode that converts the visible light into direct current (DC).
2. Some of the photovoltaic cells can also convert infrared or ultraviolet radiation into DC electricity.
3. The photovoltaic cell is composed of semiconductor material; in which semi means that it conducts electricity better than an insulator but not as well as a good conductor like a metal.
4. There are several types of semiconductor materials used in photovoltaic cells.
5. Electricity produced by these types of cells is very clean and silent.
6. Because they are not dependent on fuels other than solar radiation.
7. They do not release any polluted air or water into the environment, deplete natural resources, or endanger animal or human health.
8. The current density of a photo voltaic cell varies from $40-50\raisebox{1ex}{$mA$}\!\left/ \!\raisebox{-1ex}{$c{m}^2$}\right.$.

Thus, the correct option is option B.