Changes

A transformer works because the two circuits are wound around a common magnetized metal core. As the current alternates on the first circuit, it creates a varying [[magnetic field]].  That field, in turn, induces a current in the coils of the second circuit.  The ratio of the voltage on the two circuits is determined by the ratio of the number of times coils on the two circuits are wrapped around the metal core that serves as a magnet.

A transformer works because the two circuits are wound around a common magnetized metal core. As the current alternates on the first circuit, it creates a varying [[magnetic field]].  That field, in turn, induces a current in the coils of the second circuit.  The ratio of the voltage on the two circuits is determined by the ratio of the number of times coils on the two circuits are wrapped around the metal core that serves as a magnet.

 

[[Newt Gingrich]] and other [[conservative]]s have expressed concerns about the viability of power grid transformers against [[threat]]s from modern adversaries such as [[Islam]]ic [[jihad]] [[terrorists]], [[China]], [[Russia]] and [[North Korea]]. They consider the current "hardening" of transformers to be a major issue requiring investment.<ref>[[One Second After]] written by [[William Forstchen]] with a forward by [[Newt Gingrich]] discusses this potentially major threat to modern power transformers: [http://www.amazon.com/One-Second-After-William-Forstchen Amazon.com], Tor Books, 2011. Accessed January 5, 2015.</ref>

[[Newt Gingrich]] and other [[conservative]]s have expressed concerns about the viability of power grid transformers against [[threat]]s from modern adversaries such as [[Islam]]ic [[jihad]] [[terrorists]], [[China]], [[Russia]] and [[North Korea]]. They consider the current "hardening" of transformers to be a major issue requiring investment.<ref>[[One Second After]] written by [[William Forstchen]] with a forward by [[Newt Gingrich]] discusses this potentially major threat to modern power transformers: [http://www.amazon.com/One-Second-After-William-Forstchen Amazon.com], Tor Books, 2011. Accessed January 5, 2015.</ref>