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Question: A proton and an alpha particle having same momentum enter a magnetic field at right angles to it. If...

A proton and an alpha particle having same momentum enter a magnetic field at right angles to it. If r1 and r2 be their radii respectively then value of r1/r2 is-

A

1

B

2

C

1/2

D

1/4

Answer

2

Explanation

Solution

r = = rprα\frac { r _ { p } } { r _ { \alpha } } = 2ee\frac { 2 \mathrm { e } } { \mathrm { e } } = 21\frac { 2 } { 1 }