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Magnetism question

2008 · Shift 1 · Q55
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Magnetism question

2008 · Shift 1 · Q55

JEE AdvancedPhysicsMagnetismMultiple correct+4 / −2
A particle of mass m and charge q, moving with velocity v enters Region II normal to the boundary as shown in the figure. Region II has a uniform magnetic field B perpendicular to the plane of the paper. The length of the Region II is lll. Choose the correct choice (s). IIT-JEE 2008 Paper 1 Offline Physics - Magnetism Question 8 English
  1. A
    The particle enters Region III only if its velocity v>qlBmv \gt {{qlB} \over m}v>mqlB​
  2. B
    The particle enters Region III only if its velocity v<qlBmv \lt {{qlB} \over m}v<mqlB​
  3. C
    Path length of the particle in Region II is maximum when velocity v=qlBmv = {{qlB} \over m}v=mqlB​
  4. D
    Time spent in Region II is same for any velocity v as long as the particle returns to Region I
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