Q.

A charged beam consisting of electrons and positrons enter into a region of uniform magnetic field B perpendicular to field, with a speed v. The maximum separation between an electron and a positron will be (mass of electron = mass of positron = m)

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a

mvqB

b

2mvqB

c

4mvqB

d

mv2qB

answer is C.

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Detailed Solution

Maximum separation =2R1+2R2=4mvqB
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A charged beam consisting of electrons and positrons enter into a region of uniform magnetic field B perpendicular to field, with a speed v. The maximum separation between an electron and a positron will be (mass of electron = mass of positron = m)