Jee Advanced 2026(paper-1) physics question 12
A hollow, right circular cone of base radius ๐ and height โ, with its tip at the origin is rotating about the Z-axis with an angular velocity ๐, as shown in the figure. The cone carries a total charge ๐ uniformly distributed on its curved surface. The magnitude of magnetic field at a point (0,0, ๐ง) , where ๐ง โซ ๐ and ๐ง โซ โ, is ๐๐0 4๐ ๐๐ 2๐ ๐ง 3 . The value of ๐ is:
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