Electric Motors and Current Flow
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Questions and Answers

What happens to the rotor once current is supplied through the slip rings?

  • It completely loses its magnetic properties.
  • It generates a static magnetic field.
  • It becomes a magnet with N-Pole and S-Pole. (correct)
  • It stops moving until further power is supplied.

    • What is the result of the rotor's movement in relation to the static loops?

  • The loops create a stronger magnetic field that repels the rotor.
  • The movement causes the magnetic field to cut through the loops, inducing current. (correct)
  • The static loops become electrified permanently.
  • The movement prohibits any current flow in the loops.

    • After the alternator produces alternating current (AC), what happens next?

  • It directly powers the vehicle accessories.
  • It is immediately stored in the battery.
  • It is converted to direct current (DC) via a rectifier. (correct)
  • It is transformed into a lower voltage AC before use.

    • What occurs when the ignition switch is turned on in the alternator system?

    <p>Current travels to the slip rings, magnetizing the rotor.</p> Signup and view all the answers

    What is the role of the alternator pulley in the overall operation?

    <p>It transfers movement from the engine to the alternator shaft.</p> Signup and view all the answers

    Study Notes

    Current in Single Loop

    • Conductor is arranged in loops within a casing to interact with a magnetic field.
    • The rotor serves as the moving magnet.
    • The configuration of the conductor loops and the rotor is complementary.
    • When current is supplied to the rotor via slip rings, it creates a magnetic field with distinct N and S poles.
    • As the rotor rotates, it causes the magnetic field to intersect with the loops of the conductor.
    • This interaction induces current in the stationary loops, generating alternating current (AC) due to the regular alteration of magnetic pole direction.
    • The direction of the induced current reverses every cycle, characteristic of AC.

    Alternator Action

    • Activation occurs when the ignition switch is turned on, sending current to the slip rings from the field terminal, thereby magnetizing the rotor.
    • Cranking the engine initiates movement through the alternator pulley, which connects to the alternator shaft.
    • The rotation of the alternator shaft causes the rotor to turn.
    • This rotation results in a moving magnetic field that induces current in the stator winding.
    • The alternating current generated is then transmitted through the field terminal to the alternator.
    • The AC current first passes through a rectifier to convert it to direct current (DC).
    • The DC power is supplied to the vehicle battery and its accessories, facilitating their operation.

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    Description

    This quiz explores the principles of electric motors, focusing on how current flows in a single loop during operation. It covers the role of the rotor and the interaction between magnetic fields and conductors. Test your understanding of these concepts and their practical applications.

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