Consider the arrangement shown in the figure below whereR=5.50,=1.10m, andB=2.00T.

A vertical bar and two parallel horizontal rails lie in the plane of the page, in a region of uniform magnetic field,vectorB,pointing into the page. The parallel rails run from left to right, with one a distanceabove the other. The left ends of the rails are connected by a vertical wire containing a resistorR. The vertical bar lies across the rails to the right of the wire. ForcevectorF_apppoints from the bar toward the right.

(a)At what constant speed (in m/s) should the bar be moved to produce a current of1.50A in the resistor? m/s

(b)What power (in W) is delivered to the resistor? W

(c)What magnetic force (in N) is exerted on the moving bar? (Enter the magnitude.)

(d)What instantaneous power (in W) is delivered by the forceF_appon the moving bar?