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A proton, a deuteron and an alpha- parti...

A proton, a deuteron and an `alpha`- particle having the same kinetic energy are moving in circular trajectors in a constant magnetic field. If `r_p, r_d` and `r_(alpha)` denote respectively the radii of the trajectories of these particles then

A

`r_(e) lt r_(p) lt r_(alpha)`

B

`r_(e) lt r_(alpha) lt r_(p)`

C

`r_(e) gt r_(p) = r_(alpha)`

D

`r_(e) lt r_(p) = r_(alpha)`

Text Solution

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The correct Answer is:
D
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