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Harnessing the Power of Magnets in Electric Generator Plants

Understand how magnets work in power plants, from magnetic field lines to electromagnetic force generation. Discover the science behind why magnets attract and repel, and how turbines and transformers utilize this force to create electricity. Explore the role of Earth's magnetic field and the applications of solenoids and electromagnets in various industries.

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Harnessing the Power of Magnets in Electric Generator Plants

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  1. Why do they use magnets in Power Plants?

  2. JOURNAL - Magnetism • Draw a bar magnet • Label the poles • Draw what the field lines would look like • How does the magnet in a power plant work? What does it do?

  3. Magnetism: Magnetic Force • Where is the magnet in the Power Plant? How does it work?

  4. Magnetism: Magnetic Force • Magnetic Force: The force a magnet exerts on another magnet, iron, or moving charges.

  5. Magnetism: Magnetic Force • The force a magnet exerts on another magnet, iron, or moving charges. • Magnetic forces attract and repel one another • Like = repel • Unlike = attract Why does this happen? From where does this force come?

  6. Magnetism: Magnetic Field • Magnetic force comes from the magnetic field that surrounds a magnet. • Strongest at the poles where field lines are CLOSE, weak where lines are FAR APART N S

  7. Magnetism: Magnetic Field • A magnetic Field exerts a force on other fields. Like poles repel becauseUnlike poles attract because field lines Field lines push on each other. come together.

  8. Magnetism • What makes something magnetic? • The spin of its UNPAIRED ELECTRONS. Electron spin aligns atoms and creates a magnetic field.

  9. Magnetism • A material that has all of its atoms aligned in a single DOMAIN is magnetic. Which one below is magnetic? • Unaligned atoms • Aligned atoms. • MAGNETIC!

  10. Magnetism: Earths Magnetic Field The Earth also has a magnetic field, the MAGNETOSPHERE, due to its iron core. • Allows compasses to work • Protects us from cosmic radiation

  11. Magnetism: Electromagnetic Force • Electromagnetic Force: the forces of magnetism and electricity are both caused by electric charges. • MAGNETISM – electrons spinning • ELECTRICITY – electrons traveling

  12. Magnetism: Electromagnetic Force • In the same way that spinning electrons create a magnetic field, traveling electric charges also create a magnetic field. (see page 636)

  13. Magnetism: Electromagnetic Force • How is this useful? • USES: Solenoid: a coil of current-carrying wire. The more turns, the stronger the magnet. It creates a controlled magnetic field useful for many things.

  14. Magnetism: Electromagnetic Force • USES: Electromagnet: a coil of current-carrying wire with an iron core. The more turns, the stronger the magnet. Used in junkyards to lift heavy materials.

  15. Magnetism: Electromagnetic Force • USES: Turbine Generator – a device that induces (creates) an electrical current by spinning a magnet inside a coil of wire or vice versa.

  16. Magnetism: Electromagnetic Force • USES: Turbine Generator – a device that creates an electrical current by spinning a magnet inside a coil of wire or vice versa.Used at electrical power plants to create electricity.

  17. Magnetism: Electromagnetic Force • USES: Turbine Generator – a device that creates an electrical current by spinning a magnet inside a coil of wire or vice versa.Used at electrical power plants to create electricity.

  18. Magnetism: Electromagnetic Force • USES: Transformer – a device that increases or decreases voltage and current.Used when electricity is being transported to your home for use.

  19. Magnetism: Electromagnetic Force • USES: Transformer – a device that increases or decreases voltage and current.Which one increases? Decreases?

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