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One magnetic dipole is located at the origin (x=0) pointing at z-direction. Another dipole is located...

One magnetic dipole is located at the origin (x=0) pointing at z-direction. Another dipole is located at point x=d on the x-axis pointing at x-direction. At the infinite range, the potential energy is 0.

a. What is the potential energy of these dipoles?

b. If now the dipole at the origin points now points at the -x direction, and the other dipole remains the same, what is the potential energy?

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