Electromagnetics

• Electric currents produce their own magnetic fields.

  Electromagnetism
• Direction of the magnetic field depends on the direction of the

  current
• Based on the right hand rule, the thumb indicates the

  direction of the current
• Based in the right hand rule, the direction where the remaining fingers turn indicates the

  Direction of the magnetic field
• In order to increase the EM strength, the current that flows through the solenoid should be

  increased
• Increasing the number of coils while keeping the length the same is the same as


  decreasing the length while keeping the number of turns the same
• With concerning coils, in order to increase the EM strength the coils should be

  densely packed
• In order to increase the EM strength, an

  iron core needs to be added
• The strongest electromagnetism is found

  near the wire
• A quantity whose value can be represented by a single real number.

  Scalar
• A quantity that has both magnitude and direction in space.

  Vector
• Defined mathematically as some function that connects some arbitrary origin to a general point in space

  Fields
• In vector to vector calculations, we use

  • Addition
  • Subtraction
• In scalar to vector calculations, we use

  • Multiplication
  • Division
• 3 types of coordinate system:

  • Rectangular coordinates
  • Cylindrical coordinates
  • Spherical coordinates
• Rectangular coordinates system is also known as 


  Cartesian
• Turning a screw from x to y means that


  the screw progress towards z
• A function that returns a vector at a given point coordinate

  Vector field