, , and and For , the particle will re-enter region 1

, will get -2 marks, as a wrong option is also darkened. A uniform magnetic field B exists in the region between x = 0 and x = (region 2 in the figure) pointing normally into the plane of the paper. A particle with charge +Q and momentum p directed along x-axis enters region 2 from region 1 at point pi (y = -R). Which of the following option(s) is/are correct? For , the particle will enter region 3 through the point ?2 on x-axis

and and When the particle re-enters region 1 through the longest possible path in region 2, the magnitude of the change in its linear momentum between point pi and the farthest point from y-axis is p /

. ONE OR MORE THAN ONE of these four options is(are) correct. • For each question, marks will be awarded in one of the following categories: Full Marks : +4 If only the bubble(s) corresponding to all the correct option(s) is(are) darkened. Partial Marks : + 1 For darkening a bubble corresponding to each correct option, provided NO incorrect option is darkened. Zero Marks : 0 If none of the bubbles is darkened. Negative Marks : - 2 In all other cases. • For example, if are all the correct options for a question, darkening all these three will get +4 marks; darkening only will get +2 marks; and darkening For a fixed B, particles of same charge Q and same velocity v, the distance between the point P 1 and the point of re-entry into region 1 is inversely proportional to the mass of the particle