My explanation is not right! Though everything I said is physically correct, the A Teacher Takes A Hand Open A Mind Touches A Heart Tee Shirt a transmission line due to a rapid change in the Earth’s magnetic field is very, very small, order’s of magnitude smaller than currents actually observed. The significant induced current comes from either the Auroral or Equatorial Electrojet, which can setup a large (100km’s long) electrostatic field that runs parallel to the earth’s surface. Since the Earth is a conductor, this field will setup a current in the earth’s surface, parallel to the field, given by (Ohm’s law) J = sigma*E. It is this current that runs up the grounding of a transmission line and can potentially damage transformers. This ties into the comment made by Malcolm Sargeant about the Quebec grid being built over hard rock surfaces that are very susceptible to magnetic induction. This high susceptibility means a large sigma, which means a large/larger J for a given E.
A Teacher Takes A Hand Open A Mind Touches A Heart Tee Shirt, Hoodie, Sweater, Ladie Tee, Vneck, Bellaflowy, Kids Shirt, Unisex and Tank Top, T-shirt
Best A Teacher Takes A Hand Open A Mind Touches A Heart Tee Shirt
Whether or not a coronal mass ejection is going to A Teacher Takes A Hand Open A Mind Touches A Heart Tee Shirt ). how big the CME is, 2). where the Earth is relative to the CME event, and 3) (and most importantly) what the orientation of the magnetic field inside the solar wind is when the CME hits the Earth’s Magnetosphere. If everything is just right, through some complicated physical processes, the charged particles in the CME will interact with the Earth’s magnetosphere in such a way as to cause the Earth’s magnetic field to decrease. From Faraday’s Law (or Lenz’s law), a changing magnetic field will induce an electrical current in a closed conducting loop (http://en.wikipedia.org/wiki/Faraday’s_law_of_induction). So if a strong enough CME causes the Earth’s magnetic field to change very rapidly, the Earth’s changing magnetic field will induce currents in transmission lines (large closed loops), and if these induced currents are big enough they can overload and fry something like a transformer.