1.

            An alternating electric field, of frequency v, is applied across the dees (radius=R) of a cyclotron that is being used to accelerate protons (mass=m). The operating magnetic field used in the cyclotron and the kinetic energy (K) of the proton beam, produced by it, are given by:

A. \[B=\frac{mv}{e}\]and \[K=2m{{\pi }^{2}}{{v}^{2}}{{R}^{2}}\]
B. \[B=\frac{2\pi mv}{e}\] and \[K={{m}^{2}}\pi v{{R}^{2}}\]
C. \[B=\frac{2\pi mv}{e}\] and \[K=2m{{\pi }^{2}}{{v}^{2}}{{R}^{2}}\]
D. \[B=\frac{mv}{e}\] and \[K={{m}^{2}}\pi v{{R}^{2}}\]
Answer» D. \[B=\frac{mv}{e}\] and \[K={{m}^{2}}\pi v{{R}^{2}}\]


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