A point charge q moves with velocity v. At an observation point whose position vector r from the charge makes angle θ with v, what is the magnetic-field magnitude in the non-relativistic approximation?
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Question

A point charge q moves with velocity v. At an observation point whose position vector r from the charge makes angle θ with v, what is the magnetic-field magnitude in the non-relativistic approximation?

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G1 Physics · Accepted Answer

For a moving point charge, B=(μ₀/4π)|q|v sinθ/r².