Задача 30827.

An electron, accelerated by a potential difference of 100 V, flies into a uniform magnetic field at an angle of 30° to the magnetic induction lines. Having made 5 revolutions along a helical trajectory, it flies over a field area 10 cm long. Find; radius and pitch of the helical trajectory, as well as magnetic field induction.

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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