An alpha- particle and a proton moving with the same kinetic energy enters a region of uniform magnetic field at right angles to the field. The ratio ofthe radii of the paths of alpha-particle to that of the proton is:

An alpha- particle and a proton moving with the same kinetic energy en

1.	An alpha- particle and a proton moving with the same kinetic energy enters a region of uniform magnetic field at right angles to the field. The ratio ofthe radii of the paths of alpha-particle to that of the proton is:
Answer» `1:8` `1:1` `1:2` `1:4` Solution :RADIUS of circular path of charged particle in uniformmagnetic FIELD `r=(p)/(QB)= (sqrt(2mE))/(qB) :. E=(p^(2))/(2m)` `r_(1):r_(2)=(sqrt(m_(1)))/(q_(1)): (sqrt(m_(2)))/(q_(2))` `=(sqrt(4))/(2):(sqrt(1))/(1)=1:1`

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An alpha- particle and a proton moving with the same kinetic energy enters a region of uniform magnetic field at right angles to the field. The ratio ofthe radii of the paths of alpha-particle to that of the proton is:

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