Laws on Magnetism

• Biot-Savart Law


  Relationship of magnetic fields to the currents of their sources. This law can be applied to calculate magnetic responses even at the atomic or molecular level. Also, it can be used to compute for the aerodynamic theory with the velocity of vortex lines induction
• Ampere's Circuital Law


  For any closed path, the line integral of the component of magnetic field tangent in the direction of the path element is equal to the permeability times the electric current enclosed in the loop.
• Ampere's Circuital Law


  This is the relationship of a passing current through a straight line with the inherent magnetic field around it. In the scope of our lecture, we will assume an infinitely straight wire only.
• Ampere's Circuital Law


  This law can be directly derived from Biot-Savart Law.
• Lorentz' Force


  is a fundamental law of electromagnetism that describes the force experienced by a charged particle in an electromagnetic field. The Lorentz force law states that the force experienced by a charged particle q moving with velocity v in an electric field E and magnetic field B is given by: F = q(E + v x B)
• Left Hand Law
• Magnetic Flux is defined as the number of magnetic field lines passing through a given closed surface. It provides the measurement of the total magnetic field that passes through a given surface area.
• Faraday's Law


  If the magnetic flux through a loop changes with time then an emf(voltage) is induced around the loop. For a current to flow, we must have a closed wire loop (a circuit). The area we will consider for magnetic flux will be the area enclosed by our wire loop. Note that the wire can be looped in a circular, square, or arbitrarily complicated shape.
• Biot-Savart Law Formula


  Fill in the Blanks

  A) Magnetic Field

  B) Permeability of Free Space

  C) Current

  D) Length at same direction as current

  E) angle from dL and r

  F) Distance from dL

  
• Ampere's Circuital Law Formula


  Fill in the Blanks

  A) Magnetic Field Intensity

  B) Permeability of Free Space

  C) Number of Turns

  D) Current Intensity

  E) Radius

  
• Lorentz' Force


  Fill in the Blanks

  A) Force

  B) charged particle

  C) velocity

  D) Magnetic Field

  E) Electric field

  
• Magnetic Flux Formula


  Fill in the Blanks

  A) Magnetic Flux

  B) Magnetic Field

  C) Area

  D) angle of field lines

  
• Faraday's Law


  Fill in the Blanks

  A) Change in Magnetic Flux

  B) Time Interval

  C) Induced Voltage

  
• SI unit for Magnetic Flux

  Weber (Wb) or tesla meter squared (Tm2)
• Magnetic Flux

  If parallel to the surface angle is cos90

  If perpendicular to the surface angle is cos0