Derive an expression for the electric force, Electrical Engineering

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Q. A two-winding system has its inductances given by

1934_Derive an expression for the electric force.png

where k1 and k2 are constants. Neglecting the winding resistances, derive an expression for the electric force when both windings are connected to the same voltage source v = Vm sin ωt . Comment on its dependence on x.


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