Magnetic field and
Magnetic flux
Magnetic field
• Magnetic field is the region in space around
a magnet or electromagnet in which a
magnetic force acts on another magnet
brought into the region and is produced by
the motion of electric charge.
Magnetic field lines are imaginary lines that
indicate the direction and magnitude of the
magnetic field. The greater the number of
field lines, the stronger the field strength or
intensity. It is denoted by B and has a
standard unit of tesla in honor of Nikola Tesla
Magnetic flux
• Magnetic flux (magnetic lines of force)
which is denoted by F (F is the capital
Greek letter phi)is the number of magnetic
field lines passing through a unit area; these
lines give an indication of the strength of
the magnetic force in the region
• F= A.B or
• F= AB cos Ɵ where
• A= Area
• B= number of turns of the wire forming the
loop
• Ɵ= angle between A and B
• The greater the flux per unit area, the
stronger the magnetic field.
• B=
Ф
A
B= magnetic field
A= area
Ф= flux