Particle Accelerators: a Deuteron Has the Same Charge as a Proton

Multiple Choice

Particle accelerators: A deuteron has the same charge as a proton but approximately twice the proton mass. Suppose deuterons are being accelerated in a cyclotron in an orbit of radius 75 cm at a frequency of 8.0 MHz. What magnetic field magnitude is needed? (e = 1.60 × 10^-19 C, m_proton = 1.67 × 10^-27 kg)

A) 0.011 T
B) 0.11 T
C) 1.1 T
D) 11 T
E) 110 T