a. Using the formula given in the problem 9.2.1. determine the induction of
the magnetic field generated by a charge q moving at velocity v at a distance
r from this charge. The radius vector →− r forms an angle α with velocity v.
b. Determine the magnetic field induction of a straight wire of length l, through
which current I flows, at a distance r from the wire, if l ≪ r. The radius vector
→− r forms an angle α with the wire.
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