A hollow cylindrical magnet with inner radius a and outer radius b rotates about its axis at an angular frequency m. The magnet has a uniform axial magnetization M = az,M 0
• Sliding brush contacts are provided at the inner and outer surfaces as shown in Fig. 7- 14. Assuming that µr., = 5000 and σ= 10 (S/m) for the magnet, find
a) H and B in the magnet,
b) open-circuit voltage V0 ,
c) short-circuit current.
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