Assertion :Cyclotron is a device which is used to accelerate the positive ion. Reason: Cyclotron frequency depends upon the velocity.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Cyclotron is utilised to accelerate the positive ion. And cyclotron frequency is given by $v = \frac{B e}{2 π m}$ .It means cyclotron frequency doesn't depends upon velocity. Therefore, assertion is true and reason false.

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