Quiz4-1Bb_w_solutions

Quiz4-1Bb_w_solutions - Department of Physics UCSD Winter...

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Unformatted text preview: Department of Physics, UCSD Winter 2009 – Physics 1B(b) Prof. Dimitri Basov Quiz 4, February 25 (Version A) 1. A cosmic-ray proton in interstellar space has an energy of 10.0 MeV and executes a circular orbit having a radius equal to that of Mercury’s orbit around the Sun (5 . 80 × 10 10 m). What is the magnetic field in that region of space? (The charge and the mass of the proton are q = 1 . 6 × 10- 19 C and m = 1 . 67 × 10- 27 kg respectively. Also, 1 eV = 1 . 6 × 10- 19 J.) (a) 5 . 55 × 10- 36 T (b) 3 . 22 × 10- 25 T (c) 7 . 88 × 10- 12 T (d) 4 . 50 × 10- 10 T (e) 20 mT 2. Determine the initial direction of the deflection of charged particles as they enter the magnetic fields shown in the diagram. (iii) (i) (ii) (iv) (a) (i) Up, (ii) Out of the page, (iii) No deflection, (iv) Into the page (b) (i) Down, (ii) Into the page, (iii) No deflection, (iv) Out of the page 1 (c) (i) Up, (ii) Out of the page, (iii) Down, (iv) Into the page (d) (i) Down, (ii) Into the page, (iii) Up, (iv) Out of the page...
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Quiz4-1Bb_w_solutions - Department of Physics UCSD Winter...

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