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The cyclotron is used to

  • A.Making alloys
  • B.Purifying metals
  • C.Separating elements
  • D.Accelerating particles

Answer: D

The cyclotron is used for accelerating particles.

Lawrence's design of 1930 sends charged particles spiralling between two D-shaped electrodes in a magnetic field, with an alternating voltage across the gap giving them a push on each half-turn. The period of revolution \[T = \frac{2\pi m}{qB}\] is independent of speed, which is what lets a single fixed frequency keep accelerating them.

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