A positively charged disk is rotated clockwise as shown in figure. The direction of the magnetic...

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A positively charged disk is rotated clockwise as shown in figure. The direction of the magnetic field at point \( A \) in the plane of the disk is
\( (1) \otimes( \) into the page)
(2) \( 3 / 4 \rightarrow \)
(3) \( \leftarrow 3 / 4 \)
(4) \( \odot \) (out of the page)
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