Which of these, all of the same length, has the greater electrical resistance?
A) a copper rod
B) an iron rod
C) a rubber rod
D) all about the same
E) none of the above
Answer: C
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Potential of Point-Charges: The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of +Q is located at one of the corners of the square. What is the potential (relative to infinity) at the center when each of the other corners is also contains a point charge of +Q?
A. 0 V B. 3.0 V C. 9.0 V D. 12 V
A diatomic molecule has 2.6 × 10-5 eV of rotational energy in the l = 2 quantum state. What is its rotational energy in the l = 1 quantum state?
A) 7.8 µeV B) 8.7 µeV C) 5.3 µeV D) 4.1 µeV E) 3.4 µeV
The electric potential at the surface of a charged conductor
a. is always zero. b. is always independent of the magnitude of the charge on the surface. c. may be set equal to zero by adding an appropriate constant to the potential at all points of space. d. is always such that the potential is zero at all points inside the conductor. e. is always such that the potential is always zero within a hollow space inside the conductor.
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