1. This gives a net polarization that is parallel to the external field . 2. Then, the external field is reversed and starts to demagnetize the magnet. 3. When the core is weakly permeable, the external field is less attracted. 4. This is known as the " external field effect " ( EFE ). 5. Boltzmann subsequently generalized his distribution for the case of gases in external fields . 6. To an external field , the core is alternately weakly permeable and highly permeable. 7. This delay corresponds to a hysteresis response of the polarization to the external field . 8. Sources are external fields , fields that contribute to the action, but are not dynamical variables. 9. This magnetization as a function of the external field is described by a hysteresis curve. 10. One day, all power to the ship is knocked out, caused by an external field .
