Two parallel conducting rails with negligible resistance are 50.0 cm apart and are connected together at one end by an 16.8-Ω resistor. A conducting bar, also with negligible resistance, is free to slide along the rails. The system is in a region where a 425-mT magnetic field points perpendicular to the plane of the rails, as shown in (Figure 1).
How fast should the bar be pulled in order to produce a current of 0.150 A?
At what rate does the agent pulling the bar do work in this
situation?
Homework Answers
as we know
e = BL v
i/R = BLv
0.15 / 16.8 = 0.425* 0.5 v
v = 0.0448 m/s
=====
P = i^2 R = 0.15^2* 16.8 = 0.378 W
======
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