An electron and a proton enter a magnetic field perpendicularly. Both have same kinetic energy. Which of the following is true

Options

A. trajectory of electron is less curved
B. trajectroy of proton is less curved
C. both trajectroy ar equally curved
D. both move in strainght line path

Answer

C

Explanation

We have `qvB=(mV^(2))/(r )` or `(mv)/(qB)=sqrt(2mk)/(qB)`
for sme kinetic energy k we have `r prop sqrt(m)` here path of proton will have longer r and is therefoe loss current