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A current carrying solenoid is placed vertically and a particle of mass m with charge Q is released from rest. The particle moves along the axis of solenoid. lf g is acceleration due to gravity then the acceleration (n) of the charged particle will satisfy :
A charged particle moves along the axis of a solenoid. The magnetic field inside a solenoid is along the axis. A particle moving along the axis has velocity parallel to B, so the magnetic force $$\vec{F} = Q\vec{v} \times \vec{B} = 0$$.
Only gravity acts: $$a = g$$.
The answer is Option 4: $$a = g$$.
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