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EduGorilla
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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 the x-axis enters region 2 from region 1 at point P1 (y = – R). Which of the following options is/are correct?

### Options :-

1. 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 P1 and the farthest point from the y-axis is p/.
2. For a fixed B, particles of same charge Q and same velocity v, the distance between the point P1 and the point of re-entry into region 1 is inversely proportional to the mass of the particle.
3. For B = , the particle will enter region 3 through the point P2 on the x-axis.
4. For B > , the particle will re-enter region 1.
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