Question

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

• A. the curvature of path of electron and proton will be same
• B. they will move undeflected
• C. the curvature of path of electron is more than that of the proton
• D. the curvature of path of proton is more than that of the electron

Answer 1

The correct option is A the curvature of path of electron and proton will be same

When a charged particle enters perpendicular to a magnetic field, then it moves in a circular path of radius
$r=\frac{P}{qB}$
where q = Charge of the particle
p = Momentum of the particle
B = Magnetic field
Here p,q and B are constant for electron and proton, therefore the radius will be same.