# pe18f08 - Last updated PHY 2054 Discussion – Fall ‘08...

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Unformatted text preview: Last updated: September 30, 2008 PHY 2054 Discussion – Fall ‘08 Practice Exam Problems (Chapter 18) 1. When a 24.0-Ω resistor is connected across a 12.0-V battery, a current of 482 mA flows. What is the resulting terminal voltage of the battery? (Emf) a. 0.4 V b. 5.8 V c. 11.6 V d. 12.0 V 2. If R 1 <R 2 <R 3 , and if these resistors are connected in series in a circuit, which one dissipates the greatest power? (Resistors in Series) a. R 1 b. R 2 c. R 3 d. All are equal in power dissipation 3. Which two resistors are in parallel with each other? (Resistors in Parallel) a. R and R 4 b. R 2 and R 3 c. R 2 and R 4 d. R and R 1 R 2 R R 4 R 3 R 1 4. Resistors of values 6.0 Ω , 4.0 Ω , 10.0 Ω and 7.0 Ω are combined as shown. What is the equivalent resistance for this combination? (Equivalent resistance) a. 2.3 Ω b 3.0 Ω c. 10.7 Ω d. 27 Ω 6 Ω 4 Ω 10 Ω 7 Ω 5. If ε = 20 V, at what rate is thermal energy being generated in the 20-Ω resistor? (Combinations of resistors) a. 6.5 W resistors) a....
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pe18f08 - Last updated PHY 2054 Discussion – Fall ‘08...

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