Tutorials in Introductory Physics
Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Chapter 14.2, Problem 1cT
To determine

To Plot: I-V graph.

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The voltage V (volts), current I (amperes), and resistance R (ohms) of an electric circuit like the one shown here are related by the equation V=IR. Suppose that V is 1 increasing at the rate of 3 volt/sec while I is decreasing at the rate of amp/sec. Let t denote time in seconds. Answer the following questions. 5 dV dt = dl dt dl b. What is the value of dt? volt/sec (Simplify your answer.) OA. O C. amp/sec (Simplify your answer.) c. What equation relates to dR dt dR dV dt dt dR dt 1 dV dl +V- I dt dt dl dv =1+VdT dt dl and dt? OB. O D. d. Find the rate at which R is changing when V = 40 volts and 1= 4 amp. Is R increasing or decreasing? R is changing at ohm/sec. (Simplify your answer.) Is R increasing or decreasing? dR dt dR dt = 1 dv I'dt 1 (dV 1 dt V dl I dt F R www
A circuit contains a source of constant voltage V and two resistors connected in parallel, as shown in (Figure 1). Resistor 1 has resistance R1, and resistor 2 has resistance R2. Part C Now consider three resistors in parallel, with resistances R1, R2, and R3, as shown in (Figure 3). Again, draw a circuit diagram with a single equivalent resistor, with resistance R. What is the value of R? Figure 1 of 3 Express your answer in terms of R1, R2, and R3. V ΑΣΦ ? V R1 R2 R =
Consider the diagram at the right of a parallel circuit. Each light bulb has an identical resistance of R and the battery voltage is V. Use the labeled points on the diagram to answer the following questions. a. If the current at location A is I amperes, then the current at location B is ____ amperes. (Answer in terms of I.) b. If the current at location A is I amperes, then the current at location D is ____ amperes. (Answer in terms of I.) c. If the current at location A is I amperes, then the current at location L is ____ amperes. (Answer in terms of I.) d. If the voltage of the battery is doubled, then the current at location A would be ____ (two times, four times, one-half, one-fourth, etc.) the original value. e. If the voltage of the battery is doubled, then the current at location B would be ____ (two times, four times, one-half, one-fourth, etc.) the original value. f. If the voltage of the battery is doubled, then the current at location D would be ____ (two times, four times,…
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