#earnshaw's_theorem

Earnshaw's theorem

Statement on equilibrium in electromagnetism

Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic interaction of the charges. This was first proven by British mathematician Samuel Earnshaw in 1842. It is usually cited in reference to magnetic fields, but was first applied to electrostatic field.

Sat 6th

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