(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] 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
The mass of a proton is 1.6726 × 10 ^{27}kg and the mass of a neutron is 1.6749 × 10 ^{27}kg. 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
^{27}kg.
Calculate the binding energy of [removed] 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}
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] 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
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}
A radioactive sample has a halflife of 2.5 min. What fraction of the sample is left after 40 min? [removed]A) 1/256
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
In the ground state, the quantum numbers (n, l, m _{l}, m _{s}) for hydrogen are, respectively, [removed]A) 1, 1, 1, 1.
If a circuit has a total resistance of 24 and 2.5 x 10 ^{23}e charges flow past a terminal point in 2.0 minutes, what is the applied voltage? [removed]A) 12.0 V
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
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
^{10}m
How many neutrons are produced? [removed]A) 2.
A magnetic flux of 50 Wb increases to 100 Wb in 10 seconds, what is the induced emf? [removed]A) 12.0 V
A radioactive sample has a halflife of 10.0 min. If the sample decrease by a factor of 1/16 how much time has passed? [removed]A) 10.0 min
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}
What is the photon energy of blue light has an energy of 5.68x10 ^{19}J, what is its wavelength? [removed]A) 350 nm
If 4.0 × 10 ^{18}atoms decay with a halflife of 9.2 years, how many are remaining after 15.2 years? [removed]A) 7.6 × 10
^{17}
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
If the force between two charges decreases by a factor of 100 because the charges are moved further apart? [removed]A) 10
If a long current carrying wire created a magnetic field of 1.2 x 107 T, what is the current if you are 12.0 cm from it? [removed] 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
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

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