41. The charge dqwithin a thin section of the rod (of thickness dx) is ρA dxwhere 424.00 10 mA−=×and is the charge per unit volume. The number of (excess) electrons in the rod (of length L= 2.00 m) is n= q/(–e) where eis given in Eq. 21-12. (a) In the case where
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