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Magnetics question

2003 · Shift 0 · Q132
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Magnetics question

2003 · Shift 0 · Q132

JEE MainPhysicsMagneticsMCQ+4 / −1
A particle of mass MMM and charge QQQ moving with velocity v→\overrightarrow vv describe a circular path of radius RRR when subjected to a uniform transverse magnetic field of induction B.B.B. The network done by the field when the particle completes one full circle is
  1. A
    (Mv2R)2πR\left( {{{M{v^2}} \over R}} \right)2\pi R(RMv2​)2πR
  2. B
    zero
  3. C
    B  Q 2πRB\,\,Q\,2\pi RBQ2πR
  4. D
    B Qv 2πRB\,Qv\,2\pi RBQv2πR
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