Unformatted text preview: =2r 1 carries net charge of +Q. At the center of the sphere is a point charge +Q/2. Find the electric field strength and potential in three regions: a) r<r 1 , b) r 1 <r<r 2 and c) r>r 2 . Plot E(r) and V(r). Problem 4. The HCl molecule has a dipole moment of about 3.4x10-30 C . m. The two atoms are separated by about 1 . 10-10 m. What is the net charge on each atom? Comment on the numerical value of that charge. What is maximal torque that this dipole will experience in a 2.5 . 10 4 N/C electric field? How much energy one would need to rotate one molecule 45 o from its equilibrium orientation? Problem 5. An isolated charged parallel-plate capacitor with the plate separation d=1 mm and area of A=10 cm 2 is initially empty. One slides a polystyrene dielectric slab with thickness equal to half the plate separation and with only half the area of the plates into the region between the plates. What is the final capacitance?...
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- Fall '10
- Electric charge, net charge, flat metal plate, non-uniform charge density, inner radius r1