Problem 30985.

The magnetic field is created by two parallel long wires through which currents I1= 3 A, I2= 4 A flow; a= 10 cm. Find: magnetic field induction at point O; the angle between the magnetic induction vector at point O and straight line OA.
Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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