Which of the following is not correct about cyclotron?

 It is a machine to accelerate charged particles or ions to high energies.

Cyclotron uses both electric and magnetic fields in combination to increase the energy of charged particles.

The operation of the cyclotron is based on the fact that the time for one revolution of an ion is independent of its speed or radius of its orbit.

The charged particles and ions in cyclotron can move on any arbitrary path.