An electron is accelerated through a `PD` of `100 V` and then enters a region where it is moving perpendicular to a magnetic field `B=0.2T`. Find the
An electron is accelerated through a `PD` of `100 V` and then enters a region where it is moving perpendicular to a magnetic field `B=0.2T`. Find the radius of the circular path. Repeat this problem for a proton.
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