007 (part1 of 6) A force F~ is applied to a conducting rod
so that the rod slides with constant speed
7.1 m/s over a frictionless pair of parallel conducting rails that are separated by a distance
0.3 m. The rod and rails have negligible
resistance, but the rails are connected by a resistance 12 Ω. There is a uniform magnetic
field 0.2 T perpendicular to and directed out
of the the plane of the paper. What is the direction of the induced current in the resistor R.
1. Going up through the resistor
2. Going down through the resistor
008 (part 2 of 6) 10.0 points
Determine the magnitude of the induced emf
in the rod.
Answer in units of V.
009 (part 3 of 6) 10.0 points
Determine the electric field in the rod.
Answer in units of V/m.
010 (part 4 of 6) 10.0 points
Determine the magnitude of the induced current in the resistor R.
Answer in units of A.
011 (part 5 of 6) 10.0 points
Determine the power dissipated in the resistor
as the rod moves in the magnetic field.
Answer in units of W.
012 (part 6 of 6) 10.0 points
Determine the magnitude of the external force
applied to the rod to keep it moving with
constant speed 7.1 m/s.
Answer in units of N.