Question

A thin charged loop with a charge q>0 (uniformly distributed) and mass m is placed on a ramp which forms and angle α=45∘ 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
qB/m=1 s^−1.
Assume that the loop rolls without slipping while in contact with the ramp.

Answer 1

is it 0.75 second? please confirm it

Answer 2

it is a current brilliant challenge problem. you should solve it for yourself!