6. Consider two point charges of charge q and a fixed distance d apart that orbit around each other in the xy plane at frequency w. a. Calculate the electric dipole moment of the system b. Calculate the magnetic dipole moment of the system c. Calculate all Cartesian components of the electric quadrupole moment

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1. Consider the four point charges arranged on the corners of a square as shown. Let the direction up towards the top of the page be N. The electric field at the center of the square will point (a) N (b) S (c) E (d) W (e) NE (d) NW (e) SE (f) SW +4 d 2. The diagram shows a current loop carrying current as shown. It is effectively (a) a north pole of a magnet (b) a south pole of a magnet (c) a monopole (d) not a magnet at all

3. A uniform B-field is is directed along the +z axis. A charged particle is moving in the field. It takes on a clockwise circular path of decreasing radius in the xy plane. Which of the following must be true? A. The speed is decreasing and the particle is positive B. The speed is decreasing and the particle is negative C. The speed is increasing and the particle is positive D. The speed is increasing and the particle is negative

An alpha particle is heading towards the right. It passes through a B field pointed downwards. What is the direction of the force on the alpha particle? A. Into the screen B. Out of the screen C. Upwards D. Downwards E. Right F. Left G. It does not feel a force