Three particles having charges of +q, +Q, and - Q are placed at the corners of an equilateral triangle of side a, as shown below. The net force on the particle with charge
+q due to the other two charges is in the plane of the page and directed
(A)vertically upward
(B) vertically downward
(C) horizontally to the right
(D) horizontally to the left
(E) toward the charge - Q

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction