Energy Stored in an Inductor Assignment Help

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Energy Stored in an Inductor:

Assume current through the coil of inductance L henry increases by di amperes in dt seconds then

Induced emf = L( di / dt) Volts

1949_Energy Stored in an Inductor.png

Energy absorbed by magnetic field during time dt second is

iL . (di / dt ). dt = Li . di joules

Therefore, total energy absorbed while current increases from O to I amperes is

 W =( ½) LI 2   

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