Determine the total potential energy stored inside a nonconducting sphere of radius R and total charge Q. (ANS: U = Q2 / 40??0R)

Two point charges, A & B (qR = 123 µC), are separated by 86 cm. The distance between A & P is 20 cm. The potential at point P (see below) is zero. Determine qa. A 9A = 20 сm 86 cm WebAssign Plot

3. A CD of radius R- 3.0 cm is sprayed with a charged paint so that the charge varies continually with radial distance r from the center in the following manner: 0 = – -(6.0)r2/R2. Find the potential at a point 4.00 m2 cm above the center (on the disk axis, 4 cm away from the center).

A solid sphere of radius a=7 cm and dielectric constant ɛ=3.8 has a uniform volume charge Por density of po-29 nC/m2. The electric field is given by E(r) = Poa³ r>a The potential at the center of the sphere is. O a. 45.46 V O b. 60.62 V O c. 6.06 V O d. 30.31 V O e. 15.15 V O f.4.55 V