In "Sulam Tsor" high school, like in other public
institutions or agriculture farms which have large roofs, many solar panels are
installed. Here is a picture of the school's gym hall coverd with these solar panels.
In Israel, almost every private house or apartment building roofs are provided with black panels, usually individuals
or pairs. (like in this house)
Is the role of solar panels installed on public buildings, the same as those installed in private houses?
answer is: NO.
black panels installed in pairs on home's roofs, are called solar collectors,
and are part of the water heater system. The roleof these solar collectors is to absorb sunlight (light
energy), and convert it to heat energy used for heating water for domestic use.
solar panels which are installed on tens (like in our school) are called
photovoltaic cells, and their function is to convert light energy from the sun into electrical energy.
Watch this movie to understand how the photovoltaic cell works:
This electrical energy can pass directly
through a special converter into various
electrical devices at home: bathing water boiler, stove, computer, TV, washing
machine etc; or switch to the IEC.
solar panel is called photovoltaic cell and utilizes the photoelectric effect.
This effect also exists in elevators: the outgoing light beam from one side of
the elevator door hits the other side,
violates the photocell installed there. Absorption of the light beam by the cell
causes the closing of the elevator door
what is the main difference between solar collectors and photovoltaic cell?
Your question is interesting and informative. It is connected to everiday life and relevant environmental issues.
I peresonaly didn`t know the difference between the two types of collecting solar energy, so thank you!
Also, the topic is strongly connected to the middle school science curriculum.
I want to suggest two improvements. First, you need to check your grammar, there are some grammar mistakes in the question. In addition, I think that your question has a lot of potential to make pupils think. The students are not required to understand the scientific principles in order to unswer the question succesfully. They merly have to read the information. Instead of asking the difference, you could ask about the energy transformations in each devise. For example: if I want to heat water in an electrical kettle, in the sollary powered school - the energy is transformed 3 times (photons- electricity- heat).
Regarding the additional information - I think the pictures are very good and helpful, and the movie is enriching and relevant. The point on the map makes the connection to the school you are writing about, and very good.
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