1. The problem statement, all variables and given/known data A mass is attached to a spring through which circulates an electric current. Will the mass move? 2. Relevant equations F = I l [itex]\times[/itex] B ? 3. The attempt at a solution A spring is geometrically equivalent to a solenoid. Therefore, the current would generate a magnetic field which goes through the spring. What I'm not sure of is whether this magnetic field exerts a force on the solenoid or not. Thank you.