If a solid conducting cylinder was quickly inserted in a hole of the current-carrying pipe, it will not produce eddy currents because the field inside is zero. however, there is a magnetic in the outside of the current-carrying pipe, therefore, at entry/exist there is a magnetic field and the solid cylinder will experience eddy currents on the surface.

draw the following:

- the system

- the eddy currents

- the direction of velocity of the solid cylinder(at entry or exist)

- the direction of opposing force, would it effect the entry/exist velocity?

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?