Question

Physics 2: Dipole Moment and Electric Potential

Having a hard time with some of these questions. Help would be greatly appreciated. If you could put in all equations used and show your work it would be greatly appreciated. I want to compare the answers I got. You will be rewarded! Thanks :-)

A long cylindrical conductor shell has a uniform positive charge distribution per unit length, +2 lambda and with inner radius r and the outer radius 2r.A long wire (with the same length as the cylinder) with positive linear charge distribution of +A Is placed along the axis of the cylinder. The ratio of the surface charge density on the inner to the outer surface of the cylinder is Fig 1 shows a semicircular conductor with inner radius R and radial thickness Delta R and the net charge of zero (Fig 1). There is a point charge Q at the center of the conductor. Draw the net dipole moment produced on conductor for two cases: positive and negative point charge (+Q and -Q). What does happen on dipole moment if R increases while Delta R and Q remain constant? What does happen on dipole moment if Delta R increases while R and Q remain constant? What does happen on dipole moment if the magnitude of Q increases while R and Delta R remain constant? The electric potential at point A at distance r and angle Theta to dipole moment p (Fig 2) for lager r is given by V(r) = k p cos Theta/r2 What happens to the electric potential for Theta = 0, pi /2, pi and An electric dipole moment with constant magnitude of p = 1.5 Times -13Cm rotates around the z axis with period of 0.9 s. Suppose the dipole moment is in x direction at t = 0. Find an expression for the dipole moment as function of time. Find the electric potential as function of time at point (0.2, 0.4, 0.0). Use ECG is Electric potential vs. time. Electric field vs. time. Electric potential energy vs. time.

Answer 1