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>>Class 12
>>Physics
>>Moving Charges and Magnetism
>>Motion of Charged Particle Combined in Magnetic Field and Electric Fields
>> $The ion cannot move with a speed beyond$

Question

Assertion

The ion cannot move with a speed beyond a certain limit in a cyclotron.

Reason

As velocity increases time taken by ion increases.

A

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

B

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

C

Assertion is correct but Reason is incorrect

D

Both Assertion and Reason are incorrect

Medium

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Updated on : 2022-09-05

Solution

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Correct option is C)

Time taken is independent of velocity and radius of path.

However, maximum velocity will be given by
$v_{m a x} = \frac{q B R}{m}$

where $R$ is radius of Dee’s.

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