Magnetic effects



Section 1: Magnetic Fields

Introduction:
A moving charge or a chain of moving charges create a magnetic field around their path (velocity vector). Magnetic field is a vector so it has a magnitude and a direction. In introductory physics courses, we use some mathematical equations to find the magnitude of a magnetic field and right-hand rule for positive and electric current and left-hand rule for negative charges to find the direction of the magnetic field.

where  is the magnitude of the magnetic field, is the permeability of the medium in henries per meter (H/m).

Following picture:

  • (Left) Right-hand rule for find the connection between direction of the motion (velocity) of a moving positive charge and the magnetic field it is generating. 
  • (Right) Right-hand rule for finding the connection between direction of an electric current in a wire and the magnetic field it is generating. 



Section 2: Magnetic Force




Section 3: Inductions and Induced Current (emf)



Section 4: Faraday and Lenz's law

Summary 



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