A) continue to move in the same direction but will gain momentum
B) continue to move in opposite direction but will gain momentum
C) bend in an arc of circle
D) not to be enfluenced by magnetic field
Correct Answer: C
Solution :
Angle between the directions of motion of protons and magnetic field\[\theta =90{}^\circ \]. The magnetic force on protons is given by, \[F=q\upsilon B\sin \theta \] \[=q\upsilon B\sin 90{}^\circ \] \[=q\upsilon B\] So, there will be a centripetal force on protons. Therefore/the proton will bend in an arc of circle.
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