Question

What is the magnetic-field energy in a 15.0 cm^3 volume of space where B=4.20 T?

Answer 1

Use (1/2) B (square)/Mu knot

Answer 2

Do I have to take into consideration the volume?

Answer 3

Im confused on what the final units should be

Answer 4

It will be /\[J/m ^{3}\]

Answer 5

These are the units for energy density. If you want to calculate the energy the multiply the result \[\frac{ 1 }{2\mu _{o} }B ^{2}\] with 15\[cm ^{3}\]. Them final units will be of energy i.e., Joule.

Answer 6

Thank you!