What unit is used to measure the strength of a magnetic field?

The strength of a magnetic field is measured in Teslas. The Tesla is the SI (International System of Units) unit that quantifies magnetic flux density, which is essentially the concentration of magnetic field lines in a given area. When a magnetic field is produced, it exerts forces on charged particles moving through it, and this interaction is related to the field's strength measured in Teslas.

Understanding the context of the other units helps to clarify why the Tesla is the correct choice. Newtons measure force, volts measure electric potential, and henrys measure inductance in electrical circuits. These units all relate to different physical phenomena, but they do not pertain to the measurement of magnetic field strength. Therefore, Tesla is distinctly assigned to this property of magnetism, emphasizing its importance in physics, particularly within the realm of electromagnetism.