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A proton and an alpha-particle enter a u...

A proton and an `alpha-`particle enter a uniform magnetic field moving with the same speed. If the proton takes `25 mu s` to make 5 revolutions, then the periodic time for the `alpha-` particle would be

A

`50 mus`

B

`25mus`

C

`10mus`

D

`5mus`

Text Solution

Verified by Experts

The correct Answer is:
C
`T=(2pim)/(Bq)orTprop(m)/(q)`
`(Tprop)/(Tp)=(4m)/(2q)xx(q)/(m)=2`
`or Tprop=2[(25)/5]mus=10mus`
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