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Demonstrating the magnetic effect of a current

Magnetism and electromagnetism • The motor effect

Key concepts

What you'll likely be quizzed about

  • When an electric current flows through a conductor, it generates a magnetic field.
  • This field forms concentric circles around the wire, with the strength diminishing as the distance from the wire increases.
  • The direction of the magnetic field can be determined using the right-hand grip rule: if the thumb of the right hand points in the direction of the conventional current (flow of positive charge), the curled fingers show the direction of the magnetic field lines.

Flashcards

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What does reversing the current do to the magnetic field?

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Reversing the current reverses the direction of the magnetic field.

Key notes

Important points to keep in mind

The right-hand grip rule determines magnetic field direction.

Current direction influences magnetic field orientation.

Coils of wire can enhance magnetic fields effectively.

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