electromagnetism

Cards (22)

  • A moving charge produces an electric current, which generates a magnetic field around it.
  • Electric motors convert electrical energy into mechanical energy through the interaction between magnets and coils.
  • The direction of the magnetic field is determined by Fleming's left-hand rule (thumb points to the direction of motion, fingers wrap around the wire).
  • Paramagnetism is a form of magnetism caused by the spins of individual electrons or atoms interacting with each other.
  • Magnetic fields can be created using magnets or electric currents.
  • A moving charge creates a magnetic field around it, with the direction determined by the right-hand rule (thumb points in the direction of motion).
  • The direction of a magnetic field is indicated by lines that encircle the field, and these lines are known as magnetic field lines.
  • The strength of a magnetic field depends on the amount of electric current flowing in the conductor or the strength of the magnetic material.
  • A magnetic field is a region in space where a magnetic force can be detected.
  • Magnetic fields are created by moving electric charges or by magnetic materials.
  • The strength of the magnetic force depends on the speed of the charged particle and its mass.
  • Magnetic fields can be created by permanent magnets or induced by passing an electric current through a wire.
  • Magnets have two poles (north and south) that attract or repel other magnets depending on their orientation.
  • Like poles repel while unlike poles attract.
  • Lenz's Law states that the polarity of the induced emf opposes the cause of its production.
  • Faraday's law states that the induced emf in a closed loop is proportional to the rate of change of flux linkage with time.
  • Electric charges create magnetic fields, while moving charges create both an electric field and a magnetic field.
  • Electrically neutral objects do not have an intrinsic magnetic field unless they contain moving charges.
  • This force causes the path of the electron to bend at right angles to the original trajectory.
  • When an electron moves through a magnetic field, it experiences a force perpendicular to both its velocity vector and the magnetic field vector.
  • Electric charges create magnetic fields, which can be used to detect charged particles such as protons and alpha particles.
  • The direction of this deflection can be predicted using Fleming's left-hand rule.