PracticeTest2csolutions - PHY 2049, section 004, Spring...

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PHY 2049, section 004, Spring 2009 Test 2 Practice Name and PID:……………………………………………………………………… Please PRINT your name To get full credit you MUST show your work. Use the space provided including the reverse side of each sheet. Write your names on any additional sheets used. Possibly useful information (formula sheet) is provided. Section A (each 2 points) are short descriptive questions. Please read statements for each question and circle the correct statement (answer). Section B requires calculations/derivations. Please be as clear as possible explaining the notations, symbols etc. Section A 1. A wire made of a particular material has resistance R . Another wire made of the same material that has 1/2 the length and 1/2 the diameter has resistance? (a) 4 R (b) 2 R (c) R / 2 (d) R / 4 (e) R / 16 (b) 2. An air filled parallel plate capacitor has a constant charge q =10 -4 C on one of its plates and the voltage across the capacitor is 100 V. If the plates are pulled apart to 3 times their
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PracticeTest2csolutions - PHY 2049, section 004, Spring...

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