As shown in the figure, two frictionless conducting rails (#1 and #2) are attach

Question

As shown in the figure, two frictionless conducting rails (#1 and #2) are attached to a 20.0

As shown in the figure, two frictionless conducting rails (#1 and #2) are attached to a 20.0 degree incline such that the inside edges are 80.0 cm apart. A copper bar with a mass of 0.262 kg slides (without friction) at a constant speed down the conducting rails. If there is a vertical magnetic field of 0.0496 T in magnitude in the region of the incline, determine the magnitude of the current I that flows through the sliding copper bar.

Explanation / Answer

Magentic force , BiL = mg*sin(alpha)

0.0526*I*0.80 = 0.142*9.81*sin(20)

I = current = 0.142*9.81*sin(20) /(0.0526*0.80) = 11.32264 A

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