What are the SI units of magnetic flux?

What are the SI units of magnetic flux?

• A. Webers
• B. Teslas
• C. Henrys
• D. Coulombs

Answer: (A)

Magnetic flux is the total amount of magnetic field passing through a surface. In SI units, flux is the product of the magnetic field strength B and the area A the field threads, when the field is perpendicular to the surface. Since B is measured in teslas and area in square meters, the unit for flux is tesla·square meter, called the Weber. A Weber is also equal to volt-seconds, which ties directly to Faraday’s law: emf = −dΦ/dt. The tesla is the unit for magnetic flux density, not the total flux. The henry is the unit of inductance, relating flux linkage to current, and the coulomb is a unit of electric charge. So, the SI unit of magnetic flux is the Weber.

Magnetic flux is the total amount of magnetic field passing through a surface. In SI units, flux is the product of the magnetic field strength B and the area A the field threads, when the field is perpendicular to the surface. Since B is measured in teslas and area in square meters, the unit for flux is tesla·square meter, called the Weber. A Weber is also equal to volt-seconds, which ties directly to Faraday’s law: emf = −dΦ/dt. The tesla is the unit for magnetic flux density, not the total flux. The henry is the unit of inductance, relating flux linkage to current, and the coulomb is a unit of electric charge. So, the SI unit of magnetic flux is the Weber.