An electric current i enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged particle q moving along the axis of the circular wire passes through its center at speed v. The magnetic force acting on the particle when it passes through the center has a magnitude
A
B
C
D
zero
Text Solution
Verified by ExpertsThe correct answer is:
D
Velocity vector is parallel to magnetic field vector.
Hence, force, 
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