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A particle of 5 mg in mass and with a charge of -2.5x10 ^ 3 C,...

A particle of 5 mg in mass and with a charge of -2.5x10 ^ 3 C, affects a region of the magnetic field and acquires a circular path of 3 cm radius. If the velocity it carries is 2x10 ^ 3 m / s, determine:
a) The magnitude of the required magnetic field
b) The force experienced by the load
c) The angle between the field and the speed

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