Extra Credit: Show all your work to obtain credit. A beam of alpha particles ( q = +2e, mass = 6.64 x 10-27 kg) is accelerated from rest through a potential difference of 1.8 kV. The beam is then entered into a region between two parallel metal plates with potential difference 120 V and a separation 8 mm, perpendicular to the direction of the field. What magnitude of magnetic field is needed so that the alpha particles emerge undeflected from between the plates?
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Extra Credit: Show all your work to obtain credit. A beam of alpha particles ( q = +2e, mass = 6.64...
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