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A protn and an alpha particle enter into...

A protn and an alpha particle enter into a uniform magnetic field with the same velocity. The period of rotation of the alpha particle will be

A

four times that of proton

B

two times that of proton

C

three times that of proton

D

same as that of proton

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • Assertion (A) : If a proton and an alpha particle enter a uniform magnetic field normally with the same velocity, the time period of revolution of the alpha particle is double than that of proton. Reason (R) : In a magneitc field the time period of revolution of a charged particle is directly proportional to its mass.

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    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
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    If assertion is true but reason is false .
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    B
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