Force on a ferromagnetic object

AI Thread Summary
Calculating the force exerted on a ferromagnetic object by a solenoid's magnetic field is complex due to the field gradient. The gradient is significant because it affects the net force based on the difference in force at each pole of the magnet. Inducing a magnetic dipole in the object adds further complexity to the calculations. For practical applications, such as building a DIY coilgun with 8J of energy, trial-and-error may be necessary to achieve desired results. Understanding these principles is crucial for effective design and experimentation.
mahela007
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How can one calculate (even as a rough estimate) the force exerted on a ferromagnetic object by a magnetic field created by a solenoid? Thanks
 
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With great difficulty, since it depends on the gradient of the field, which is not simple for a solenoid.
 
oh well..
Just for the sake of knowledge, does the gradient of the field come into play because all magnets have two poles and because the net force depends on the difference between the force on each end?
 
Yes - although in this case it's more complicated, since you need to induce a magnetic dipole in the object.
 
well, I asked this question because I'm building a simple DIY coilgun.. (just 8J of energy stored in the caps). So I'm going to have to resort to trial-and-error. Thanks for your help.
 
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