F09 - Exam 1(1) - 1 Pulling the plates of an isolated...

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1. Pulling the plates of an isolated charged capacitor apart: A) increases the potential difference B) does not affect the potential difference C) decreases the potential difference D) increases the capacitance E) does not affect the capacitance 2. A small object has charge Q. Charge q is removed from it and placed on a second small object. The two objects are placed 1 m apart. For the force that each object exerts on the other to be a maximum. q should be: A) Q /4 B) Q /2 C) 2 Q D) Q E) 0 3. Consider Gauss's law: 0 / . E d A q ε =   Which of the following statements about the terms in this formula is true? on the at any point on the surface 4. A hollow metal sphere is charged to a potential V . The potential at its center is: 5. A neutral metal ball is suspended by a string. A positively charged insulating rod is placed near the ball, which is observed to be attracted to the rod. This is because: A) the ball becomes positively charged by induction B) the number of electrons in the ball is more than the number in the rod C) the string is not a perfect insulator D) there is a rearrangement of the electrons in the ball E) the ball becomes negatively charged by induction Version 1 Page 1
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