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 1cTH
- 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.)
c. Rank the boxes according to their equivalent resistance. Explain. (Do not calculate the resistance of each network; use the model instead.)
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Consider the circuit shown in the figure. Suppose the four resistors in this circuit have the values R1= 13 Ω, R2= 6.1 Ω, R3= 8.0 Ω, and R4 = 10 Ω, and that the emf of the battery is E= 15 V
A) Find the current through each resistor using the rules for series and parallel resistors. Express your answers using two significant figures separated by commas.
B) Find the current through each resistor using Kirchhoff's rules.
Express your answers using two significant figures separated by commas.
State which of the following statements are true and which are false. Give reasons for your
answers.
a) A very simple circuit consists of a battery connected across a resistor. In this circuit, the
battery and the resistor are both in series and also in parallel.
b) A resistor R and a capacitor C connected in series combine as = +
1
1
RC
R
c) Natural uranium is not radioactive until it has been processed by enrichment for use in
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d) Infrared light is more likely to cause electrons to be emitted from a metal than ultraviolet
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e) Special and General Relativity effects both matter for the operation of GPS, the former slow-
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Determine the magnitudes and directions of the currents in each resistor shown in the figure. The batteries have emfs of E1 = 8.2 V and E2= 11.8 V and the resistors have values of R1 = 30 Ω , R2 = 36 Ω , and R3 = 34 Ω.
Part A) Ignore internal resistance of the batteries. Express your answers using two significant figures. Enter your answers numerically separated by commas.
Part B) Which way is I1 directed?
Part C) Which way is I2 directed?
Part D) Which was is I3 directed?
Part E) Assume each battery has internal resistance 1.3 Ω .Express your answers using two significant figures. Enter your answers numerically separated by commas.
Part F) Directions of all I?
Sorry for the length! thank you!
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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