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The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________

The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________ Correct Answer decrease the magnetic stored energy at constant flux

fe=-(∂Wfld (φ,x))/∂x = -(∂Wfld (∅,x))/∂x and Te = -(∂Wfld(φ,θ))/∂θ = -(∂Wfld (∅,θ))/∂θ The negative sign before ∂Wfld indicates that fe acts in a direction as to tend to decrease the stored energy at constant mmf.

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