A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ratio of their radii is :

A proton and helium nucleus are shot into a magnetic field at right an

1.	A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ratio of their radii is :
Answer» <P>`1:1` `1:2` `2:1` `1:4` Solution :The radius of the circular path, of a charged PARTICLE in MAGNETIC field `or R=(mv)/(q B)=sqrt((2mE)/(q B)) therefore r ALPHA sqrtm/q` `r_(p)/r_(He)=1/1`

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A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ratio of their radii is :

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