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A charged particle is fired at an angle ...

A charged particle is fired at an angle `theta` to a uniform magnetic field directed along the x-axis. During its motion along a helical path, if the pitch of the helical path is equal to the maximum distance of the particle from the x- axis.

A

cos`theta`=`1/pi`

B

sin`theta`=`1/pi`

C

tan`theta`=`1/pi`

D

tan`theta`=`pi`

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