Homework problem 21.33
21.33
A copper rod of length 0.85 m is lying on a frictionless table (see drawing).
Each end of the rod is attached to a fixed wire by an unstretched spring whose
spring constant is k = 75 N/m. A magnetic field with a strength of
0.16 T is oriented perpendicular to the surface of the table.
- What must be the direction of the current in the copper rod that causes the
springs to stretch?
- If the current is 12 A, by how much does each spring stretch?
