5. ssm The drawing shows three identical rods (A, B, and C) moving in different planes. A constant magnetic field of magnitude 0.45 T is directed along the +y axis. The length of each rod is L = 1.3 m, and the rods each have the same speed, vA = vB = vC = 2.7 m/s. For each rod, find the magnitude of the motional emf, and indicate which end (1 or 2) of the rod is positive.

 

w1175

 

For Rod A,

 

 

 

For Rod B,

 

 

From right hand rule, end 2 is the more positive end.

 

For Rod C,

 

 

There is an induced emf, but it is front and back and not between ends 1 and 2, so with respect to ends 1, 2

 

 

 

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This page last updated on June 23, 2018