This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: krueger (mck734) HW #4 lewis (21514) 1 This printout should have 38 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. Chapter 19...... if you forgot how to solve 3 equations for 3 unknowns, review http://en.wikipedia.org/wiki/System o f l inear e quationsSolving al inear s ystem 001 (part 1 of 2) 10.0 points A battery with an emf of 12 . 9 V and internal resistance of 0 . 96 is connected across a load resistor R . If the current in the circuit is 2 . 02 A, what is the value of R ? Answer in units of . 002 (part 2 of 2) 10.0 points What power is dissipated in the internal re sistance of the battery? Answer in units of W. 003 (part 1 of 4) 10.0 points A battery has an emf of 12 V and an in ternal resistance of 0 . 2 . Its terminals are connected to a load resistance of 1 . Find the current in the circuit. Answer in units of A. 004 (part 2 of 4) 10.0 points Calculate the terminal voltage of the battery. Answer in units of V. 005 (part 3 of 4) 10.0 points Find the power dissipated in the load resistor. Answer in units of W. 006 (part 4 of 4) 10.0 points Find the power dissipated in the battery. Answer in units of W. 007 (part 1 of 5) 10.0 points A string of 23 identical Christmas tree lights are connected in series to a 120 V source. The string dissipates 55 W. What is the equivalent resistance of the light string? Answer in units of . 008 (part 2 of 5) 10.0 points What is the resistance of a single light? Answer in units of . 009 (part 3 of 5) 10.0 points How much power is dissipated in a single light? Answer in units of W. 010 (part 4 of 5) 10.0 points One of the bulbs quits burning. The string has a wire that shorts out the bulb filament when it quits burning, dropping the resistance of that bulb to zero. All the rest of the bulbs remain burning. What is the resistance of the light string now? Answer in units of . 011 (part 5 of 5) 10.0 points How much power is dissipated by the string now? Answer in units of W. 012 (part 1 of 2) 10.0 points Consider the following two cases. 4 A E 2 2 Case a 4 A E 2 2 Case b Find the ratio of dissipated powers, P a P b . 1. P 1 P b = 8 2....
View
Full
Document
This note was uploaded on 03/23/2010 for the course PHYSICS 1444 taught by Professor Jarafee during the Spring '10 term at UT Arlington.
 Spring '10
 Jarafee
 Physics, Resistance, Light

Click to edit the document details