Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 20.2, Problem 1bTH
- The circuit at right consists of a bulb in series with an electrical “black box.”
The following are possible contents for the “black box.” All the bulbs are identical. Box C consists of a single piece of connecting wire.
Suppose that each of the five boxes is placed, in turn, into the circuit. (Only one box is in the circuit at a time.)
b. Use the model that we have developed to rank the five circuits according to the brightness of the indicator bulb in those circuits.
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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,…
Imagine building a circuit using a perfect conductor (a device with zero resistance) in place of the carbon resistor
a. Would the plot of the data be a straight line?
b. If yes, what would the slope of that line be? If no, what shape would the line be?
A. The circuit at right is made from an ideal battery connected to 5 identical light bulbs as shown.
i.
Rank the brightness of the bulbs from brightest to
dimmest. If any are equal or not lit, state so explicitly.
Explain your reasoning.
E
F
iii.
A sixth bulb, bulb F, is added to the circuit as shown.
Will the current through the battery increase, decrease, or
stay the same? Explain.
B
E
iv.
With the addition of bulb F does the brightness of bulb E increase, decrease, or stay the
same? Explain.
V.
With the addition of bulb F does the brightness of bulb B increase, decrease, or stay the
same? Explain.
Chapter 20 Solutions
Tutorials in Introductory Physics
Ch. 20.1 - In tutorial, you compared the relative brightness...Ch. 20.1 - Use the model for electric current to rank the...Ch. 20.1 - Rang the brightness of the bulbs. Explain your...Ch. 20.1 - A wire is now added to the circuit as shown. i....Ch. 20.1 - Rank the networks according to their equivalent...Ch. 20.1 - How does adding a single bulb to a circuit in...Ch. 20.1 - How does adding a single bulb to a circuit in...Ch. 20.1 - The network AE above are connected, in turn, to...Ch. 20.1 - Rank the bulbs in order from brightest to dimmest....Ch. 20.1 - Suppose that a switch has been added to the...
Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - The circuit at right consists of a bulb in series...Ch. 20.2 - In the circuit at right, the voltage across bulb 1...Ch. 20.2 - Prob. 2bTHCh. 20.2 - Box A and box B are now interchanged. It is...Ch. 20.2 - Consider the circuit as shown. i. Rank bulbs A, B,...Ch. 20.2 - b. A student cuts the write between bulbs A and C...Ch. 20.2 - Consider the following discussion between two...Ch. 20.2 - Rank bulbs 16 in order or brightness. Explain your...Ch. 20.2 - Rank the voltages across the bulbs. Explain your...Ch. 20.2 - Write an equation that relates the voltage across...Ch. 20.2 - Bulb 1 is removed from its socket. i. Does the...Ch. 20.3 - Describe the behavior of the bulb in the two...Ch. 20.3 - A second identical bulb is flow added to the...Ch. 20.3 - Just after the switch is closed: • what is the...Ch. 20.3 - A long time after the switch is closed: • rank the...Ch. 20.3 - Summarize your results by describing the behavior...
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