Electricity | Grade 6 | Unit 1 - Concept 3 - Lesson 3 - Part (1/2) | Science

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In This Lesson:
Generating Electricity
Generator:
Structure:
It consists of:
Large magnets. - Coiled wires.
Function:
It changes mechanical energy (kinetic energy) into electrical energy used in lighting houses and operating electrical devices.
How does a generator work?
When large magnets spin at a high speed, the spinning magnets create electrical charges on the coiled wires, so electricity is produced.
There are different forces that can be used to make the magnets in generator spin to generate electricity, such as:
1 Water in dams is used to operate water turbines, causing the magnets in the generator to spin.
2 Winds are used to operate wind turbines, causing the magnets in the generator to spin.
3 Sources of fuel such as oil and coal are used to make water boil producing steam which causes the magnet in the generator to spin.
 
What Do You Already Know About Energy as a System?
▌The flow of electricity through wires is known as "electric current".
▌When an electric current flows through a wire, it forms a magnetic effect around
the wire known as "magnetic field".
▌If a wire wrapped around a metal core, the magnetic field produced by the flowing current is strengthened, so the metal core attracts the iron nails as in the opposite picture.
Components of a Circuit
Electricity:
▌It is a form of energy that comes from a flow of electric charges moving along a path, these charges called "electrons".
Electric circuit:
To make the electric current flow through a circuit, the loop (circuit) must be closed, this means that it must begin and end in the same place without any breaks in the loop.
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