Newton's 3rd Law and electric charges

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bgq
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Hi,

Is Newton's 3rd law applicable to electric charges?

I have a problem with a situation where two identical positive charges moving perpendicular to each other. The magnetic forces exerted by each one on the other have same magnitude but their directions are not opposite.
 
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NIII does not hold for moving charges. The momentum of the electromagnetic fields changes for two moving charges, so the sum of their mechanical momentum is not conserved.
 
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there is a Newton's third?