Question

A charged particle is moving in a cyclotron, what effect on the radius of path of this charged particle will occur when the frequency of the radio frequency field is doubled?

• A. It will also be doubled
• B. It will be halved
• C. It will be increased by four times
• D. It will remain unchanged

Answer 1

The correct option is D It will remain unchanged

As frequency of revolution in a cyclotron
$v_C=\frac{Bq}{2\pi m}$ is independent of r.
So the radius of path of particle will remain unchanged.
When the frequency is changed.