the bar shown in the figure below moves on rails to the right with a velocity v with arrow, and a uniform, constant magnetic field is directed out of the page. which of the following statements are correct? (select all that apply.) a vertical bar and two parallel horizontal rails lie in the plane of the page, in a region of uniform magnetic field, vector bout, pointing out of the page. the parallel rails run from left to right, with one lying a short distance above the other. the left ends of the rails are connected by a vertical wire containing a resistor. the vertical bar lies across the rails to the right of the wire. the bar moves to the right with velocity vector v. the induced current in the loop is zero. the induced current in the loop is clockwise. the induced current in the loop is counterclockwise. an external force is required to keep the bar moving at constant speed. no force is required to keep the bar moving at constant speed.