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 6.1, Problem 4bT
Show that a simple application of the model for current that we have developed thus far is inadequate for determining how the brightness of bulb B changes when the switch is opened.
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Students have asked these similar questions
The figure below shows a simplified model of a cardiac defibrillator, a device used to resuscitate
patients in ventricular fibrillation.
S
R
Rorso
+
The capacitor C charge through the resistor R (when the switch S is toggled to left) and discharge
current through the patient's torso which is of resistance (when the switch S is toggled to right). This
phenomenon allows the heart's normal rhythm to be reestablished.
(a) If the capacitor is initially uncharged with C = 7.0 µF; ɛ = 1240 V, find the value of R (in ohms)
required to charge the capacitor to a voltage of 800 V in 2.1 s.
(b) If the capacitor is then discharged across the patient's torso with Rtorso = 1200 Q, calculate the
voltage (in V) across the capacitor after 4.0 ms.
The capacitor in the circuit shown below is initially uncharged. The switch is closed at t=0 s. AVbattery = 30 V, C =
3.0 F, and R = 2.0 Q. At sometime after the switch is closed, the current in the circuit is measured to be 5.9 A. What
is the charge on the capacitor at this time, in Coulomb?
Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not
include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the
question statement.
CH
When a steady current, I, is flowing through a conductor (e.g. the carbon paper here) with a non-negligible resistance, R, it will be possible to maintain a potential difference, ∆V = IR, between parts of the conductor along the direction of the current. Explain why in this situation there should be an electric field in the direction of the current but not in the direction perpendicular to the current.
Chapter 6 Solutions
Tutorials in Introductory Physics
Ch. 6.1 - Obtain a battery, a light bulb, and a single piece...Ch. 6.1 - A student has briefly connected a wire across the...Ch. 6.1 - Light a bulb using a battery and a single wire....Ch. 6.1 - Carefully examine a bulb. Two wires extend from...Ch. 6.1 - Compare the brightness of the two bulb with each...Ch. 6.1 - Compare the brightness of each of the bulbs in the...Ch. 6.1 - We may think of a bulb as percentage an obstacle,...Ch. 6.1 - Compare the brightness of the bulbs in this...Ch. 6.1 - Is the brightness of each bulb in the two-bulb...Ch. 6.1 - Formulate a rule for predicting how the current...
Ch. 6.1 - Does the amount of current through a battery seem...Ch. 6.1 - Unscrew one of the bulbs in the two-bulb parallel...Ch. 6.1 - The circuit at tight contains three identical...Ch. 6.1 - Show that a simple application of the model for...Ch. 6.2 - The circuits at right contain identical batteries,...Ch. 6.2 - The circuits at right contain identical batteries...Ch. 6.2 - Predict the relative brightness of bulbs...Ch. 6.2 - Set up the circuit with a single bulb and the...Ch. 6.2 - Set up the circuit containing two bulbs in series...Ch. 6.2 - Predict what the voltmeter would read if it were...Ch. 6.2 - Set up the circuit with two bulbs in parallel as...Ch. 6.2 - Answer the following questions based on the...Ch. 6.2 - Set up the circuit with three bulbs as shown and...Ch. 6.2 - Before setting up the circuit shown at right:...Ch. 6.2 - Both circuits al right have more than one path for...Ch. 6.3 - A capacitor is connected to a battery, bulb, and...Ch. 6.3 - Remove the capacitor and the bulb from the...Ch. 6.3 - Suppose an uncharged capacitor is connected in...Ch. 6.3 - Suppose that instead of connecting the uncharged...Ch. 6.3 - Suppose that the bulbs were connected in parallel...Ch. 6.3 - After completing the experiments above, two...Ch. 6.3 - Suppose that a different capacitor of smaller...Ch. 6.3 - Before connecting the circuit a student makes the...Ch. 6.3 - Make the following prediction on the basis of your...
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- The capacitor in the circuit shown below is initially uncharged. The switch is closed at t = 0 s. AVbattery = 30 V, C = 3.0 F, and R=2.0 Q. At sometime after the switch is closed, the current in the circuit is measured to be 3.1 A. What is the charge on the capacitor at this time, in Coulomb? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardAccording to Kirchhoff's second law, the algebraic sum of the emf will be equal to the algebraic sum of the product of current and resistance of a closed part of an electric circuit. Select one: O True O Falsearrow_forwardIn the circuit shown below, find the current and the voltage for each circuit element at the following times. (a)Long time after switch S is closed, and (b)Write down the relevant equations whose solution would yield the currents 1,,1, and 1, at an arbitrary time t. Just write down these equations and do not solve them. L=15mH R= 500 E - 50V R =750arrow_forward
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