(PLEASE READ BEFORE STARTING). There are no known typos in the exam. In problems that have no multiple choice answer please submit a word document (docx or doc) or PDF via email, showing ALL your work so that you might get partial credit in trying to solve the problem. There is also a space provided for "essay" type questions where you are supposed to show your work. I would highly advise you submit all work you do whether multiple choice or not in this word document or PDF.

 A circuit has two resistor in series. The first is 1000 and the second is 10,000 . If the applied voltage is 12.0 V what is the power dissipated in each resistor? [removed] 2. See the figure. If net force on the 1 nC charge is zero. What is q? (n is nano and means 10 -9) [removed]A) 0.68 nC [removed]B) 0.75 nC [removed]C) 12.0 nC [removed]D) 1.0 nC 3. The mass of a proton is 1.6726 × 10 -27kg and the mass of a neutron is 1.6749 × 10 -27kg. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be: [removed]A) greater than (1.6726 + 1.6749) × 10 -27kg. [removed]B) less than (1.6726 + 1.6749) × 10 -27kg. [removed]C) equal to (1.6726 + 1.6749) × 10 -27kg. [removed]D) any of these; it depends on the energy released during the capture. 4. Calculate the binding energy of [removed] 5. A beam of light traveling in air is incident on a transparent plastic at an angle of incidence of 26 o. What is the angle of refraction if the index of refection of the material is 1.41? [removed]A) 12 o [removed]B) 26 o [removed]C) 18 o [removed]D) 51 o 6. The work function of a material is 3.5 eV. If the material is the illuminated with monochromatic light (l = 300 nm), what are: a) the stopping potential b) the cutoff frequency [removed] 7. An atom has 8 protons and 17 nucleons. If it undergoes beta - decay, what are the number of protons and neutrons, respectively, in the daughter nucleus? [removed]A) 8, 18 [removed]B) 7, 16 [removed]C) 8, 17 [removed]D) 9, 17 8. If light is traveling from a material with an index of refraction of 1.57 into air, what is the critical angle for total internal reflection? [removed]A) 97.3 o [removed]B) 39.6 o [removed]C) 15.9 o [removed]D) 12.1 o 9. A radioactive sample has a half-life of 2.5 min. What fraction of the sample is left after 40 min? [removed]A) 1/256 [removed]B) 1/16 [removed]C) 1/8 [removed]D) 1/65,536 10. An object is 25 cm from a thin lens with a focal length of 15 cm. Where is the image formed? [removed]A) 39 cm [removed]B) 20 cm [removed]C) 37.5 cm [removed]D) 10 cm 11. In the ground state, the quantum numbers (n, l, m l, m s) for hydrogen are, respectively, [removed]A) 1, 1, 1, 1. [removed]B) 1, 0, 0, 0. [removed]C) 1, 1, 1, ±1/2. [removed]D) 1, 0, 0, ±1/2. 12. If a circuit has a total resistance of 24 and 2.5 x 10 23e charges flow past a terminal point in 2.0 minutes, what is the applied voltage? [removed]A) 12.0 V [removed]B) 80.0 V [removed]C) 9.00 V [removed]D) 8010 V 13. A photon is incident on a metal that has a work function of 6.80 eV. If the longest wavelength of light is emitted, what type of light is this? [removed]A) radio [removed]B) visible [removed]C) ultraviolet [removed]D) infrared 14. The energy of a 2.00 keV electron is known to within ±3.00%. How accurately can its position be measured? [removed]A) 6.0 x 10 -10m [removed]B) 2.1 x 10 -10m [removed]C) 8.4 x 10 -10m [removed]D) 1.5 x 10 -10m 15. How many neutrons are produced? [removed]A) 2. [removed]B) 3. [removed]C) 12. [removed]D) 1. 16. A magnetic flux of 50 Wb increases to 100 Wb in 10 seconds, what is the induced emf? [removed]A) 12.0 V [removed]B) 5.0 V [removed]C) 10.0 V [removed]D) No emf is induced 17. A radioactive sample has a half-life of 10.0 min. If the sample decrease by a factor of 1/16 how much time has passed? [removed]A) 10.0 min [removed]B) 20.0 min [removed]C) 15.0 min [removed]D) 40.0 min 18. If an energy intensity of 2000 W is exerted by a spherical source what will be its average power output at a distance of 12 m from it? [removed]A) 3.1 W/m 2 [removed]B) 1.1 W/m 2 [removed]C) 2.1 W/m 2 [removed]D) 4.1 W/m 2 19. What is the photon energy of blue light has an energy of 5.68x10 -19J, what is its wavelength? [removed]A) 350 nm [removed]B) 450 nm [removed]C) 200 nm [removed]D) 550 nm 20. If 4.0 × 10 18atoms decay with a half-life of 9.2 years, how many are remaining after 15.2 years? [removed]A) 7.6 × 10 17 [removed]B) 1.7 × 10 17 [removed]C) 1.3 × 10 18 [removed]D) 1.1 × 10 18 21. An electron is accelerated from rest to a speed of 7.89 x 106 m/s, what potential difference did it cross? [removed]A) 512 V [removed]B) 177 V [removed]C) 300 V [removed]D) 295 V 22. If the force between two charges decreases by a factor of 100 because the charges are moved further apart? [removed]A) 10 [removed]B) 16 [removed]C) 2 [removed]D) 8 23. If a long current carrying wire created a magnetic field of 1.2 x 10-7 T, what is the current if you are 12.0 cm from it? [removed] 24. An atom has 97 protons and 251 nucleons. If it undergoes alpha decay, what are the number of protons and nucleons, respectively, in the daughter nucleus? [removed]A) 94, 247 [removed]B) 96, 245 [removed]C) 100, 249 [removed]D) 95, 247 25. In the nuclear reaction e- + e+ (assume the particles are not moving to begin with), what is the net energy released in keV? [removed]A) 1022 keV [removed]B) 511 keV [removed]C) 1,000,000 keV [removed]D) 100 keV

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