Density, density, density. (a) A charge -305e is uniformly distributed along a c

Question

Density, density, density. (a) A charge -305e is uniformly distributed along a circular arc of radius 6.50 cm, which subtends an angle of 58o. What is the linear charge density along the arc? (b) A charge -305e is uniformly distributed over one face of a circular disk of radius 4.10 cm. What is the surface charge density over that face? (c) A charge -305e is uniformly distributed over the surface of a sphere of radius 2.80 cm. What is the surface charge density over that surface? (d) A charge -305e is uniformly spread through the volume of a sphere of radius 2.20 cm. What is the volume charge density in that sphere?

Explanation / Answer

a)

CHARGE / DISTANCE
(-305 * 1.602 * 10^-19)/((58/360)*2*pi*.065)


b)

CHARGE / AREA
(-305 * 1.602 * 10^-19)/(pi*.041^2)


c)

CHARGE / AREA
(-305 * 1.602 * 10^-19)/(4*pi*.028^2)


d)

CHARGE / VOLUME
(-305 * 1.602 * 10^-19)/((4/3)*pi*.022^3)

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