In SI units, what is magnetic field strength (magnetic flux density) $B$ measured in?

• A. weber (Wb)
• B. newton (N)
• C. tesla (T)
• D. volt (V)

Answer: (C)

Verified step by step guidance

1. Understand that magnetic field strength, also known as magnetic flux density, is represented by the symbol \(B\) in physics.
2. Recall that magnetic flux density \(B\) is defined as the magnetic flux \(\Phi\) per unit area \(A\), mathematically expressed as \(B = \frac{\Phi}{A}\), where \(\Phi\) is measured in webers (Wb) and \(A\) in square meters (m\(^2\)).
3. Recognize that the SI unit of magnetic flux density \(B\) is derived from the units of magnetic flux and area, resulting in webers per square meter (Wb/m\(^2\)).
4. Know that the unit tesla (T) is defined as one weber per square meter, so \$1\ \text{T} = 1\ \text{Wb/m}^2$.
5. Therefore, the magnetic field strength \(B\) is measured in teslas (T) in the SI system.