Here the field is nearly uniform within the coils and does not flare out anywhere as it does at the ends of an open solenoid.

 
  • 這里線(xiàn)圈內的磁場(chǎng)接近均勻;那里任何地方都不會(huì )象在開(kāi)口螺旋管兩端那樣發(fā)生向外擴張。
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