## Question

###### A proton (charge 1.6 X 10-19 â‚¬ and mass 1.67 X 10-27 kg) moves with a velocity v through a region where both a uniform magnetic field (B = ~j + k T) and a uniform electric field (E ~2i +j + 3k NJC) exist: Calculate: (a) the velocity of the proton so that the proton moves in a circular trajectory of constant speed: () the radius of the circular path

A proton (charge 1.6 X 10-19 â‚¬ and mass 1.67 X 10-27 kg) moves with a velocity v through a region where both a uniform magnetic field (B = ~j + k T) and a uniform electric field (E ~2i +j + 3k NJC) exist: Calculate: (a) the velocity of the proton so that the proton moves in a circular trajectory of constant speed: () the radius of the circular path

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