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A cyclotron uses a magnetic field to move charged particles in a circular path.
It also uses a high frequency power supply to repeatedly accelerate the
particles. S Ion
power supply Ernest Lawrence was the first person to use a cyclotron. His cyclotron
accelerated protons to a maximum energy of 8.0 × 104 eV. With this energy,
the protons moved in a circular path with a radius of 6.5 × 10–2 m.
27. The maximum speed of the protons in Lawrence’s cyclotron was
A. 1.5 × 1013 m/s B. 1.7 × 108 m/s C. 3.9 × 106 m/s D. 9.8 × 1015 m/s Use your recorded answer for Multiple Choice 27 to answer Multiple Choice 28.*
28. The magnitude of the magnetic field used by Lawrence was
A. 6.3 × 10–1 T B. 2.7 × 101 T C. 2.4 × 106 T D. 1.6 × 109 T *You can receive marks for this question even if the previous question was answered incorrectly. 17 Use the following information to answer the next question.
Sources of Electromagnetic Radiation
4 Movement of outer electrons to lower orbitals
Deceleration of high-speed electrons
Decay of radioactive nuclei
Rotation of an armature in a generator Numerical Response
11. Match each of the sources of electromagnetic radiation with the type of
electromagnetic radiation it produces given below. Use each number only once.
light __________ __________
(AC) (Record all four digits of your answer in the numerical-response section on the answer sheet.) 29. An ice rink is lit by a bluish light with a wavelength of 500 nm. The period of the
A. 1.67 × 10–15 s B. 8.33 × 10–13 s C. 6.00 × 105 s D. 6.00 × 1014 s 18 Numerical Response
12. The Compton Gamma Ray Observatory is a satellite that is able to detect
electromagnetic radiation from throughout the universe. The Compton
Observatory can detect photons ranging from 4.00 × 104 eV to 3.00 × 1010 eV.
The highest frequency that can...
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- Fall '09