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A comment on Tests show high-temperature superconducting magnets are ready for fusion. Parent comment

Re:Tests show high-temperature superconducting magnets are r... by Certhas on Saturday March 09, 2024 @12:35PM (#39653261)
Thank you, that's the kind of point I was looking for.

Why does JxB scale quadratically? Because a stronger field can contain (linearly) more current?

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Re:Tests show high-temperature superconducting magnets are r... by pfdietz on Saturday March 09, 2024 @01:12PM (#39653603)
If you double the current J, you double the magnetic field B.

But the JxB force is now quadrupled, because you doubled both J and B.

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