# Exam2 - Principles of Physics II PHYS 2212-160 Exam#2...

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Principles of Physics II PHYS 2212-160 Exam #2 Lectures 6 – 11 Fall 2010 Name__ ________________ You may use the values k = 8.99x10 9 N m 2 /C 2 , ε o = 8.85x10 -12 C 2 /Nm 2 , and e = 1.60x10 -19 C. 1. (10 points) A parallel-plate capacitor is made with square plates of side 2.50mm and has a plate separation of 0.300mm . How much charge would have to be put on the capacitor to achieve a voltage of 12.0V ? 2. (5 points) A capacitor is being charged with a current of 1.75mA . How many electrons are deposited on the capacitor in 5.00seconds? 3. (5 points) Copper 4-gauge wire, with a circular cross section, has a diameter of 5.189mm . How long must a wire be to have a resistance of 25.0 if copper has a resistivity of 1.7x10 -8 m . 4. (10 points) Four charges form the corners of a square with a side length of 4.00cm . Three of the charges are 3.00 μ C and one charge is -3.00 μ C . What is the potential at the center of the square if we define V=0 at infinity? 5.

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Exam2 - Principles of Physics II PHYS 2212-160 Exam#2...

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