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Electric Currents from Magnetism

Explore the fascinating world of electromagnetic induction as electric currents from magnetism are harnessed in transformers. Learn how charges in wires move with magnet motion, and how changing magnetic fields generate currents in circuits. Unravel the complexities of electromagnetic force, where electricity and magnetism intertwine to create powerful electromagnetic waves. Discover the workings of transformers with coils and iron loops, adjusting voltage for residential and industrial purposes. Step into the realm of step-up and step-down transformers, vital in power distribution from plants to neighborhoods.

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Electric Currents from Magnetism

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  1. Electric Currents from Magnetism Chapter 18 Section 3 Physical Science

  2. Electromagnetic Induction • The charges in a wire can be moved by moving a magnet in and out of a coil of wire. • In a circuit, a current is made by changing the magnetic field.

  3. Electromagnetic Force • The electromagnetic force is due to electricity and magnetism. • Electromagnetic waves are made of magnetic and electric fields oscillating at right angles to each other.

  4. Transformers • Made of two coils wrapped around opposite sides of a closed iron loop. • A magnetic field is made by a primary coil and creates a current in the secondary coil.

  5. Transformers • Used to adjust the voltage to homes • Step-up transformers increase the voltage leaving power plants • Step-down transformers decrease the voltage entering neighborhoods

  6. End of Class Review • With your group answer the following questions on page 639: • # 1, 2, 3, 4, 5, and 6

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