a charge q of mass m moving with velocity v i + v j enters a region of magnetic field B j and electric field E j. . what is the correct expression for the pitch during 1st revolution Share with your friends Share 10 Shobhit Mittal answered this time required to complete one revolution T=2πmBqthis is the time the particle gains the pitch for the first revolution use second eqn of motion a=qEmpitch d=vT+qEmT22=v2πmBq+qEm2πmBq22=2πmvBq+Em2πB22q this will be the pitch for the first revolution .Regards 15 View Full Answer