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Magnetic flux facts for kids
Electromagnetism 

Electricity · Magnetism 
Electric charge • Coulomb's law •
Electric field • Electric flux • Gauss's law • Electric potential energy • Electric potential • Electrostatic induction • Electric dipole moment • Polarization density 
Magnetostatics
Ampère's law • Electric current • Magnetic field •
Magnetization • Magnetic flux • Biot–Savart law • Magnetic dipole moment • Gauss's law for magnetism 
Electrodynamics
Lorentz force law • emf • Electromagnetic induction • Faraday’s law • Lenz's law • Displacement current • Maxwell's equations • EM field • Electromagnetic radiation • Liénard–Wiechert potential • Maxwell tensor • Eddy current

Electrical Network
Electrical conduction • Electrical resistance • Capacitance •
Inductance • Impedance • Resonant cavities • Waveguides 
Covariant formulation
Electromagnetic tensor • EM Stressenergy tensor • Fourcurrent • Electromagnetic fourpotential

Magnetic flux (Φ_{B}) is the number of magnetic field lines (also called "magnetic flux density") passing through a surface (such as a loop of wire). The magnetic flux through a closed surface (such as a ball) is always zero. This implies that there cannot be magnetic charges in classical electromagnetic.
The SI unit of magnetic flux is the Weber (Wb) (in derived units: voltseconds).
The CGS unit is the Maxwell.
Magnetic flux is sometimes used by electrical engineers designing systems with electromagnets or designing dynamos. Physicists designing particle accelerators also calculate magnetic flux.
Other pages
 Magnetic field
 James Clerk Maxwell demonstrated that electric and magnetic forces are two complementary aspects of electromagnetism.
 Maxwell's equations describe the behavior of both the electric and magnetic fields, as well as their interactions with matter.
 Gauss's law gives the relation between the electric flux flowing out a closed surface and the electric charge enclosed in the surface.
 Carl Friedrich Gauss developed a collaboration with Wilhelm Weber which led to new knowledge in the field of magnetism.