A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 4.4 m/s perpendicular to a 0.54-t magnetic field. the resistance of the rod and tracks is negligible. the rod maintains electrical contact with the tracks at all times and has a length of 1.1 m. a 0.77-î resistor is attached between the tops of the tracks. ((b) find the change in the gravitational potential energy that occurs in a time of 0.20 s. -2.215
a) -4.43 J
b) -2.21 J
c) -1.10 J
d) -0.50 J
