- Take a solar panel of 10 watt
- Connect one of the wires to the negative terminal of the solar panel
and the fan.
- Cut the other wire in half and connect both parts to the key.
- Now connect both ends of this wire to the solar panel and the fan.
- Expose the solar panel to sun light.
- Turn on the key to allow current to reach the fan.
- The fan will start spinning due to solar power.
Presentation of lesson:
Hooking:
- Energy may be defined as the capacity or ability to do some work.
- Energy has many forms : such as kinetic energy, potential energy, heat
energy, thermal energy, nuclear energy, electrical energy and solar
energy etc
- Without energy life is not possible. Plants need solar energy to
prepare their food in the process of photosynthesis.
- Human being needs more sources of energy to run industries, factories,
operate vehicles, planes, ships, etc.
- Oil, gas and charcoal were the widely used source of natural energy
used by the world in 20th Century.
- However, with the development in science, technology, mathematics and
engineering more sources were invented to fulfill the requirement of
the energy source of the world.
- Sun is the main source of energy. The core of sun fuses about 600
million tons of hydrogen into helium every second, converting 4
millions tons of matter into energy every second as a result. This
energy escaped from the core of the sun in the form of heat and light
energy.
- This solar energy can be utilized to produced electrical energy and
can be a great renewable alternative to the limited non renewable
sources of energy such as Coal, Oil and gas.
- Solar PV panel have been around for quite some time now. These panel
convert Solar energy to electrical energy.
- The model explained here will help the students to get motivated
towards innovations and research.
Formative Assessment:
- What is energy?
- Why do plant and animals need energy?
- Why do human need energy?
- What are the most common sources of energy?
- Do you think that solar energy can be an alternative to
hydroelectricity?
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