Question

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

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

Answer 1

The correct option is A curved path of electron and proton will be same (ignoring the sense of revolution)

$Bqv=\frac{m{v}^2}{R}\Rightarrow mv=BqR\Rightarrow p\alpha R$