4th Quarter Physics Summative

• Magnetism


  A physical phenomena produced by the motion of electric charge, resulting an attractive or repulsive force between objects
• Magnets


  Objects that generates magnetic field
• North and South Poles


  What are the two distinctive regions as magnetic poles
• Like poles repel and Unlike poles attracts


  Law of magnetism
• Magnetic field


  It is a vector field that describes the magnetic influence of electric charges in relative motion and magnetized materials.
• At rest creates an electric field
• Electric field exerts a force F=qE on any other charge that present in the field
• Moving charge or current creates magnetic field in the surrounding space
• B


  Symbol for magnetic field
• Zero


  If the particles v is along a parallel axis, the Fb is?
• The angle between zero force axis and particles direction


  If the magnitude of magnetic force is proportional to vsinθ, θ is?
• Magnetic force is always perpendicular to velocity
• Fb=qvBsinθ


  Formula for magnetic force
• Newton


  Si Unit of magnetic force
• N/C.m/s


  Si unit of magnetic field
• A moving charge generates both magnetic and electric field that is known as electromagnetic field
• Magnetic field exist in permanent magnet without electric field
• Electric field can occur as a static electricity without magnetic field
• Nature of electric field, surrounds by electric charge
• Nature of magnetic field, surrounds by moving charge
• Unit of electric field, N/C
• Unit of magnetic field, Gauss and Tesla
• Force of electric field, proportional to electric charge
• Force of magnetic field, proportional to charge and speed of electric charge
• Movement in electromagnetic force of an electric field it is perpendicular to magnetic field
• Movement in electromagnetic force of an magnetic field it is perpendicular to electric field
• Formula for magnetic flux

  Magnetic flux= BAcosθ
• 1 wb is equivalent to 1 T.m^2
• It is the combination of electric and magnetic force due to electromagnetic field

  Lorentz Force
• Lorentz force is also known as electromagnetic force
• The force that an electric field exerts on a charge

  Electrostatic force
• The force that a magnetic field exerts on a moving charge particles

  Magnetic force
• Formula for Lorentz Force

  F=qE+qvB
• Magnetic force on a current-carrying wire Formula

  F=BILsinθ
• We can make current flow through a wire by connecting it to a voltage source
• As we increase current its field also increases
• As we move further away from the wire, the field we see drops off proportionally with distance
• Permeability is the ability of a free space to store energy
• Who are the two physicist that conducted a groundbreaking experimet about Induce electromotive force

  Michael Faraday and Joseph Henry
• Induced current and emf is responsible for induced EMF