A proton of mass m moving with a speed v...

A proton of mass m moving with a speed `v(ltltc`, velocity of light in vacuum) completes a circular orbit in time T in a uniform magnetic field. If the speed of the proton is increased to `sqrt2v`, what will be time needed to complete the circular orbit?

`sqrt(2)` T

`(T)/(sqrt(2))`

`(T)/(2)`

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