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Helmholtz coil (cancelation on of earth magnetic field)

Physics Asked on October 23, 2020

How the Helmholtz coil cancels the earth magnetic field. Can anyone explain it pictorially?

One Answer

A Helmholtz coil produces a fairly uniform magnetic field in the region near the center of the two coils. To cancel the Earth's field (in that region), the coils would have to be oriented with the Earth's field along the axis of the coils. (Don't forget the dip in the Earth's field.)

Answered by R.W. Bird on October 23, 2020

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