PRESENTED BY,

J M VIRGIN MARY

PHYSICAL SCIENCE

ST JACOB’S TRAINING COLLEGE

What are the uses of Solar energy?

•For photosynthesis.•For drying clothes.•For cooking food.•For heating water.•For generating electricity.

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Solar pannel

SOLAR PANNEL

•Electronic device.•Made by assembling solar cells.•Solar energy falls on one side of a solar cell,a small current is produced -photoelectric effect.•Electric current is stored in battery and used when required.

Give some uses of solar energy?

•Developed to provide electricity for satellites.•Used in calculators, street lights.•SPV produces electricity of 1000kw.

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solar water heater

•Heat from the sun is used to heat water.•water is pumped through blackened pipes into the glass panel.•Water is pumped at the bottom.so convection helps the flow of hot water on the top.

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SOLAR COOKER

•Can cook food as a conventional oven.•A basic solar cooker is an insulated box with a glass top.•Heat from sunlight gets trapped and cook food.

Guess the picture? Solar

power plant

•Generate electricity.•concave reflectors are used to focus sun's rays on blackened pipes with water.•water boils and becomes steam.•Steam rotates the turbine.•Generator attached to turbine is activated.•Guragon in haryana,capacity-500kw.

Give the advantages of solar energy?

•Long lasting.•Can be used almost everywhere.•Cost effective solution to energy issues.•Totally silent and non-polluting.

•High initial cost.•Require large area.•Silicon used in cells is expensive.

Give the limitations of solar energy?