# PHY HW - alexander(jla2439 – Homework V – Belay...

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Unformatted text preview: alexander (jla2439) – Homework V – Belay – (20490) 1 This print-out should have 33 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points The distance between the K + and Cl − ions in KCl is 2 . 8 × 10 − 10 m. Calculate the energy required to separate the two ions to an infinite distance apart, assuming them to be point charges initially at rest. The charge on an electron is 1 . 6 × 10 − 19 C and the Coulomb constant is 8 . 99 × 10 9 N · m 2 / C 2 . 1. 709 . 1 eV 2. 4 . 37 eV 3. 8 . 91 eV 4. 6 . 77 eV 5. 5 . 14 eV 6. 101 . 3 eV 002 10.0 points A positive charge of 10 − 6 coulomb is placed on a solid conducting sphere that is mounted on an insulating post. + Which of the following is true? 1. The charge resides uniformly throughout the sphere. 2. An insulated metal object acquires a net positive charge when brought near to, but not in contact with, the sphere. 3. The electric field in the region surround- ing the sphere increases with increasing dis- tance from the sphere. 4. When a second conducting sphere is connected by a conducting wire to the first sphere, charge is transferred until the electric potentials of the two spheres are equal. 5. The electric field inside the sphere is con- stant in magnitude, but not zero. 003 10.0 points You have a potential difference of 11 V. How much work is done to transfer 0 . 35 C of charge through it? Answer in units of J. 004 10.0 points Two negatively charged spheres with different radii are shown in the figure below.- Q- Q The two conductors are now conneted by a wire. Which of the following occurs when the two spheres are connected with a conducting wire? 1. Negative charge flows from the smaller sphere to the larger sphere until the elec- tric field at the surface of each sphere is the same. 2. No charge flows. 3. Negative charge flows from the smaller sphere to the larger sphere until the electric potential of each sphere is the same. 4. Negative charge flows from the larger sphere to the smaller sphere until the elec- tric field at the surface of each sphere is the same. alexander (jla2439) – Homework V – Belay – (20490) 2 5. Negative charge flows from the larger sphere to the smaller sphere until the elec- tric potential of each sphere is the same....
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PHY HW - alexander(jla2439 – Homework V – Belay...

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