Energy in Electric and Magnetic FieldsBoth electric fields and magnetic fields store energy. For the electric field the energy density is
This energy density can be used to calculate the energy stored in a capacitor. For the magnetic field the energy density is
which is used to calculate the energy stored in an inductor. For electromagnetic waves, both the electric and magnetic fields play a role in the transport of energy. This power is expressed in terms of the Poynting vector. |
Index Voltage concepts Electric field concepts | ||||
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