JEE Advanced 2017 Paper 2

Section: Physics

Question : 10 of 54

Marks: +1, -0

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 P1(y=−R). Which of the following option(s) is/are correct?

[JEE Adv 2017 P2]

For B=
8
13
P
QR
the particle will enter region 3 through the point P2 on x-axis
For B>
8
13
P
QR
the particle will re-enter region 1
For a fixed B, particles of same charge Q and same velocity v, the distance between the point P1 andthe point of re-entry into region 1 is inversely proportional to the mass of the particle
When the particle re-enters region 1 through the longest possible path in region 2, the magnitude of thechange in its linear momentum between point P1 and the farthest point from y−axis is p/√2

Validate

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