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(a) A charge of -330e is uniformly distributed along acircular arc of radius 3.75 cm,which subtends an angle of 42°. What is the linearcharge density along the arc?

C/m

(b) A charge of -330e is uniformly distributed over oneface of a circular disk of radius 1.95 cm. What is the surface charge density overthat face?

C/m2

(c) A charge of -330e is uniformly distributed over thesurface of a sphere of radius 1.95 cm. What is the surface charge density overthat surface?

C/m2

(d) A charge of -330e is uniformly spread through thevolume of a sphere of radius 1.95 cm. What is the volume charge density in that sphere?

C/m3

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