# Magnetic takeoff

A thin charged loop with a charge $$q>0$$ (uniformly distributed) and mass $$m$$ is placed on a ramp which forms and angle $$\alpha= 45^{\circ}$$ with the horizontal. Due to the presence of an external homogeneous magnetic field of magnitude $$B$$ directed into the page, the loop "takes off" after a time $$t^{*}$$. Determine the time $$t^{*}$$ in seconds if $\frac{q B}{m}= 1~\mbox{s}^{-1}.$ Assume that the loop rolls without slipping while in contact with the ramp.

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