ch22_p56 - 56. From dA = 2r dr (which can be thought of as...

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56. From dA = 2 π r dr (which can be thought of as the differential of A = π r ²) and dq = σ dA (from the definition of the surface charge density σ ), we have dq = © ¨ § ¹ ¸ · Q π R 2 2 π r dr where we have used the fact that the disk is uniformly charged to set the surface charge
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This note was uploaded on 01/25/2011 for the course PHYSICS 17029 taught by Professor Rebello,nobels during the Fall '10 term at Kansas State University.

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