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An electron has a magnetic field of uncertain direction and a size of 7.4x10-2 T with...

An electron has a magnetic field of uncertain direction and a size of 7.4x10-2 T with a speed of 2.5x106 m / s.
It moves in an area where it is located.
a) What is The largest and smallest possible values ​​of the acceleration of the electron due to the magnetic field

b) If the actual acceleration of the electron is a quarter of the value you find, the electron speed and the magnetic field
What is the angle between? (qe = 1.6x10-19 C, me = 9.11x10-31 kg)
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