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Exploring Magnetism and Electricity: Similarities, Differences, and Applications

Discover the key concepts of magnetism and electricity, learn about how they work, and explore their various applications in devices like motors and generators.

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Exploring Magnetism and Electricity: Similarities, Differences, and Applications

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Presentation Transcript

  1. ReviewMagnetism – Attractive and Repulsive

  2. How is the concept of magnetism and electricity different? • Magnetism is caused by the spinning of electrons • Electricity is caused by the flow of electrons

  3. How are magnetism and electricity the same. • Both have opposite poles • Both will affect the other

  4. What do you call a hollow cylinder with wire wrapped around and how can it be changed? • Solenoid • Increase or decrease the number of wires • Increase or decrease the power to the coils • Increase or decrease the size of the shaft

  5. Describe a motor and give the key concept that makes it work. • Permanent magnet • Rotor with commutator and coils • Power Source • Electrical currents cause a magnetic field • Likes repel • Changes electrical to mechanical energy

  6. Describe a generator and give the key concept that makes it works • Permanent magnet • Rotor • You are the power • Mechanical energy to electrical energy

  7. What are the 2 types of current electricity? • Direct Current • Source is a dry cell (battery) • Electrons flow in one direction • Alternating Current (house) • Generators – water, wind, solar • Electrons reverse direction

  8. What device is used to increase or decrease the amount of electricity flows into a house? • Transformer • How does it work? • Wire coils around a magnetic core regulates the electricity flowing out the other side • Step Up and Step Down

  9. Old Stuff • Where are the strongest points of a magnet? • Poles • The areas around the poles are ______ • Domains • Give the direction of a magnetic field • North to south

  10. Old Stuff • How do you de-magnetize an object? • Heat it • Bang it • What is electromagnetic induction? • Electromagnetic induction is the generation of a current by a changing magnetic field. • Rules of magnet • Likes repel, opposites attracts

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