In any transformer the Poynting vector E×H points away from the primary winding into the field, and from the field into the secondary winding. The Poynting vector results from the superposition of the E=−∂A/∂t field associated with the changing magnetic flux and the H fields of the currents in the windings.
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© 1984 American Association of Physics Teachers.
1984
American Association of Physics Teachers
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