(A) : In a cyclotron the time for one revolution of an ion is independent of its speed or radius of its orbit.
(R) : In a cyclotron the sign of the electric field changes alternately in tune with the circular motion of particle.

Options

A. Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
C. 'A' is true and 'R' is false
D. 'A' is false and 'R' is false

Answer

B