Surface current on a spherical superconductor

gausswell
Homework Statement
Find the surface current on a spherical superconductor.
Relevant Equations
K=sigma * v
I need help with part b.
21926439f11214bdb3d781885d057ff2.png

My solution:
e632f985b3cb7405287859652045a98d.png

Have I done it right?
 
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gausswell said:
Have I done it right?
Your work looks right to me.
 
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