Find the differential volume in the annulus

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In a non-conducting region, voltmeter measurements show that the potential has a spherical symmetry, with voltage varying with radial distance as V(r) = Brn , where B and N are constants.

a.) Find how much charge is enclosed in the differential spherical annulus between r and r + dr?

b.) Find the differential volume in the annulus between rand r + dr?

Reference no: EM13665609

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