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Q.
A charged particle moves along the axis of a current carrying solenoid. It experiences
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Solution:
Inside a solenoid, magnetic field is along axis. The force on moving charged particle in magnetic field, F = qvB sin $ \theta $ Particle is moving in direction of magnetic field. $ \therefore $ $ \theta =0{}^\circ $ $ \therefore $ $ F=0 $ $ \{\because \,sin0{}^\circ =0\} $