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Differences Between Electric and Magnetic Forces Screen Cast for MSSE 580
Electric Force Coulomb’s Law permittivity of free space Charles-Augustin de Coulomb (1736–1806)
Electric Field Electric Field Electric field is Electric force per unit charge – It is a vector quantity Space around ever...
Magnetic Force <ul><li>Magnetic Force is due to the motion of a charged particle </li></ul><ul><li>Moving charge particles...
Magnetic Field Magnets exert a magnetic field around them The direction of the field is from the north to south pole Where...
Electric & Magnetic Force/Field Electric force is in the direction of the electric field if the charge, q is positive Elec...
Ø rsted’s Observation Hans Christian Ørsted (1777-1851) A current of charges generates a magnetic field
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MSSE 580 Screen Cast

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MSSE 580 Screen Cast

  1. 1. Differences Between Electric and Magnetic Forces Screen Cast for MSSE 580
  2. 2. Electric Force Coulomb’s Law permittivity of free space Charles-Augustin de Coulomb (1736–1806)
  3. 3. Electric Field Electric Field Electric field is Electric force per unit charge – It is a vector quantity Space around every charged body is filled with an electric field This distortion of space is what causes the electric force, rather than what is normally considered to be a contact force. The electric field can be represented by field lines. These lines start on a positive charge and end on a negative charge The number of field lines starting or ending from a charge is proportional to the magnitude of the charge dipole
  4. 4. Magnetic Force <ul><li>Magnetic Force is due to the motion of a charged particle </li></ul><ul><li>Moving charge particles are normally electrons </li></ul><ul><li>A stationary charged particle does not interact with a static magnetic field </li></ul><ul><li>A moving charge has both a magnetic and electric field surrounding it </li></ul><ul><li>A charge moving through a magnetic field experiences a force - This force acts perpendicularly to both the magnetic field and the direction of the particle </li></ul>
  5. 5. Magnetic Field Magnets exert a magnetic field around them The direction of the field is from the north to south pole Where the field lines are closer the field is stronger A charge surrounded by electric field is also surrounded by a magnetic field if it is moving Magnetic field lines are closed loops Electric sources are inherently monopole, i.e., point sources Magnetic sources are inherently dipole, i.e., poles cannot be isolated
  6. 6. Electric & Magnetic Force/Field Electric force is in the direction of the electric field if the charge, q is positive Electric Force = q E The magnetic force on the other hand is given by the right hand rule and is perpendicular to the magnetic field Magnetic Force = q v B
  7. 7. Ø rsted’s Observation Hans Christian Ørsted (1777-1851) A current of charges generates a magnetic field

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