What is the magnetic energy density in a volume where the magnetic field is 4.0 mT? A) 3.2 × 10^-3 J/m³ B) 3.2 J/m³ C) 6.4 J/m³ D) 13 J/m³ E) 13 × 10^-3 J/m³

Question

Quizplus · Accepted Answer

The magnetic energy density (u) in a vacuum is given by:

u = (1/2) * B^2

where B is the magnetic field strength.

Substituting B = 4.0 mT (or 4.0 x 10^-3 T), we get:

u = (1/2) * (4.0 x 10^-3)^2 = 8.0 x 10^-6 J/m^3

Therefore, the magnetic energy density in the given volume is 6.4 J/m^3 (option C).

What Is the Magnetic Energy Density in a Volume Where