1.

An alpha particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities. The ratio of the radii of their circular paths is

Answer»

`4 : 1`
`1:4`
`2:1`
`1:2`

SOLUTION :As per relation `r - (MV)/(r_p), (r_(ALPHA))/(r_p) =(m_(alpha))/(m_p) XX (q_p)/(q_(alpha)) = 4/1 xx 1/2 = 2/1 = 2: 1`


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