Uploaded March 2020 | Updated September 2026, 2 weeks ago
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Learn how to make electricity using only a magnet and conductor! This video explains the basics of how ac electrical generators work. By the end of the video, you will know how 95% of all electrical power is generated and how almost all power stations work! The process is more simple than you might imagine!
Like this video? Then check out our other videos!
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▶️How To Make Electricity (Power Generation)
You don’t need much to generate electricity, only a magnet and conductor.
A magnetic field surrounds all magnets. If a magnetic field passes over a conductor, voltage is induced in that conductor. A static magnetic field surrounding a conductor induces NO voltage in the conductor! The magnetic flux needs to be varied (non-constant) for voltage to be induced. Magnetic flux is the magnetic field multiplied by the conductor area perpendicular to that field.
The strength of the magnetic field, and the magnetic field area that the conductor moves through per second, dictates how much voltage is induced in the conductor. Its possible to vary the voltage by increasing the area of the conductor that the magnetic field lines come into contact with, or, by increasing the strength of the magnetic field (increasing the magnetic flux density). Typical electrical conductor materials include copper and aluminium.
To continuously generate electricity, we need to continuously move a conductor through a magnetic field, or, move a magnetic field continuously across a conductor. The most efficient way to do this is by either rotating a magnet within a conductor, or by rotating a conductor within a magnetic field.
This video shows a permanent magnet attached to a rotating paddle wheel. The magnet is physically attached to the paddle wheel. As water flows across the paddle wheel (hydro turbine), the paddle wheel rotates and so does the magnet. As the magnet rotates, a changing magnetic field passes over the conductor coil. Because the magnet is constantly moving, the magnetic field is constantly changing, which means voltage is constantly induced in the conductor coil.
Water flow is continuous, so the paddle wheel and magnet rotate continuously, and the magnetic field varies continuously. The result is that voltage is induced at a constantly increasing and decreasing rate in the conductor (represented by a sine wave).
Over 95% of power stations generate electricity using this simple concept, although the process is more complicated. Coal fired power stations burn coal to generate heat, which turns water to steam, and the steam rotates a steam turbine, which is connected to a generator rotor, which rotates and induces voltage in a stator. All thermal power stations convert heat to electricity, usually by heating water to steam, but sometimes also by heating other fluids. Irrespective of which energy fluid is used, a turbine is involved, and this is connected to an ac (alternating current) generator. The type of power station may change, but the basic principle of ac electrical power generation remains the same.
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#saVRee_Nuggets, #saVRee
Want to LEARN about engineering with videos like this one? Then visit:
courses.savree.com
Want to TEACH/INSTRUCT with the 3D models shown in this video? Then visit:
savree.com/en/teach-engineering
Want to TRAIN your workforce or employees using videos like this one? Then visit:
savree.com/en/enterprise-engineering-training
And don't forget to sign-up to our newsletter for free engineering Handbooks, Videos, and Courses.
courses.savree.com/pages/email-signup
******************************************************************
Learn how to make electricity using only a magnet and conductor! This video explains the basics of how ac electrical generators work. By the end of the video, you will know how 95% of all electrical power is generated and how almost all power stations work! The process is more simple than you might imagine!
Like this video? Then check out our other videos!
🚢 Marine Diesel Two Stroke Engine - How it Works! - youtu.be/IM8rxp8qB8k
🚢 Ship Parts and Terminology Explained! - youtu.be/Xm-F2rPU_NU
⚙️How Deaerators Work! - youtu.be/M_jOsTWVIH8
⚙️How Shell and Tube Heat Exchangers Work! - youtu.be/OyQ3SaU4KKU
⚙️How Power Grids Work! - youtu.be/fUWRyhsutL8
⚙️How Watertube Boilers Work! - youtu.be/fUWRyhsutL8
⚙️How Dams Work (Hydro Dams)! - youtu.be/ztM6tL6LtFs
💡Control Valve Types (Gate Valve, Globe Valve etc.)! - youtu.be/OyQ3SaU4KKU
💡Transformer Parts and Functions! - youtu.be/3osmO4FQ2Yg
💡Plate Heat Exchangers Explained! - youtu.be/7TTF4aU3Pcs
📚Want to learn more about engineering?
Then join saVRee to access over 45 hours of engineering video courses! New courses every month!
courses.savree.com
Hope to see you on a course soon! 👋
🏫Want to use the 3D model in this video to present, instruct, or teach? Simply join saVRee! We have over 400 engineering models that will make your life a lot easier!
savree.com
📱Check out our socials!
https://linktr.ee/savree
📖You can learn more about engineering in our technical encyclopedia: savree.com/en/encyclopedia
▶️How To Make Electricity (Power Generation)
You don’t need much to generate electricity, only a magnet and conductor.
A magnetic field surrounds all magnets. If a magnetic field passes over a conductor, voltage is induced in that conductor. A static magnetic field surrounding a conductor induces NO voltage in the conductor! The magnetic flux needs to be varied (non-constant) for voltage to be induced. Magnetic flux is the magnetic field multiplied by the conductor area perpendicular to that field.
The strength of the magnetic field, and the magnetic field area that the conductor moves through per second, dictates how much voltage is induced in the conductor. Its possible to vary the voltage by increasing the area of the conductor that the magnetic field lines come into contact with, or, by increasing the strength of the magnetic field (increasing the magnetic flux density). Typical electrical conductor materials include copper and aluminium.
To continuously generate electricity, we need to continuously move a conductor through a magnetic field, or, move a magnetic field continuously across a conductor. The most efficient way to do this is by either rotating a magnet within a conductor, or by rotating a conductor within a magnetic field.
This video shows a permanent magnet attached to a rotating paddle wheel. The magnet is physically attached to the paddle wheel. As water flows across the paddle wheel (hydro turbine), the paddle wheel rotates and so does the magnet. As the magnet rotates, a changing magnetic field passes over the conductor coil. Because the magnet is constantly moving, the magnetic field is constantly changing, which means voltage is constantly induced in the conductor coil.
Water flow is continuous, so the paddle wheel and magnet rotate continuously, and the magnetic field varies continuously. The result is that voltage is induced at a constantly increasing and decreasing rate in the conductor (represented by a sine wave).
Over 95% of power stations generate electricity using this simple concept, although the process is more complicated. Coal fired power stations burn coal to generate heat, which turns water to steam, and the steam rotates a steam turbine, which is connected to a generator rotor, which rotates and induces voltage in a stator. All thermal power stations convert heat to electricity, usually by heating water to steam, but sometimes also by heating other fluids. Irrespective of which energy fluid is used, a turbine is involved, and this is connected to an ac (alternating current) generator. The type of power station may change, but the basic principle of ac electrical power generation remains the same.
**********
#saVRee_Nuggets, #saVRee
