The Lorentz force law is
Initially, , so the second term inside the parenthesis is . So, at , the particle experiences a force in the direction of the electric field, which gives the particle a velocity in the direction of the electric field. Since and are parallel, the second term inside the parenthesis is still . So, the particle will continue to move in a straight line and not experience any magnetic force. Therefore, answer (E) is correct. |

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