Question

identify which of the following is the unit of magnetic flux density?

a. weber

b. weber⁻¹

c. weber/m

d. tesla

Explanation:

To determine the unit of magnetic flux density, we recall the definitions:

• Weber (Wb) is the unit of magnetic flux ($\Phi$), not flux density.
• Magnetic flux density ($B$) is defined as magnetic flux per unit area ($B = \frac{\Phi}{A}$). The unit of area is $\text{m}^2$, so the unit of $B$ is $\frac{\text{Weber}}{\text{m}^2}$, which is also called Tesla (T).

Options a (Weber) is for flux, b ($\text{Weber}^{-1}$) is incorrect, c ($\text{Weber/m}$) is incorrect (should be per $\text{m}^2$). Only d (Tesla) matches the unit of magnetic flux density.

Answer:

d. Tesla