If an electron and a proton having same momenta enter perpendicular to a magnetic field, then

Options

A. curved path of electron and proton will have same radius of curvature (ignoring the sense of revolution)
B. they will move undeflected
C. curved path of electron is more curved than that of the proton
D. path of proton is more curved

Answer

A

Explanation

`Bqv=(mv^(2))/4impliesr=(mv)/(Bq)=p/(Bq)`
r will be same for electron and proton as p, B and q are of same magnitude.