PhyIIHW5 - hopkins (tlh982) HW 05 criss (4908) This...

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hopkins (tlh982) – HW 05 – criss – (4908) 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points A 3 . 1 cm length oF tungsten flament in a small lightbulb has a resistance oF 0 . 031 Ω. ±ind its diameter. (The resistivity is 5 . 6 × 10 8 Ω · m). Answer in units oF mm. 002 10.0 points A length oF copper wire has a resistance 32 Ω. The wire is cut into three pieces oF equal length. The pieces are then connected as parallel lengths between points A and B. What resistance will this new “wire” oF length L 0 3 have between points A and B? Answer in units oF Ω. 003 10.0 points A 11 V battery delivers 116 mA oF current when connected to a 74 Ω resistor. Determine the internal resistance oF the battery. Answer in units oF Ω. 004 10.0 points A platinum resistance thermometer has a re- sistance oF 200 Ω when placed in a ice 0 C bath and 169 Ω when immersed in a crucible containing a melting substance. What is the melting point oF the substance? The temperature coe²cient oF the platinum is 0 . 00392( C) 1 . Answer in units oF C. 005 (part 1 oF 4) 10.0 points An energy plant produces an output potential oF 4300 kV and serves a city 176 km away. A high-voltage transmission line carries 690 A to the city. The e³ective resistance oF a trans-
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This note was uploaded on 09/03/2009 for the course PHY PHY 2049 taught by Professor Robertr.criss during the Fall '08 term at University of South Florida - Tampa.

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PhyIIHW5 - hopkins (tlh982) HW 05 criss (4908) This...

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