PHYS 212 FOR SCI+ENG W/MAST PHYS >ICP<
1st Edition
ISBN: 9781323834831
Author: Knight
Publisher: PEARSON C
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Textbook Question
Chapter 28, Problem 7CQ
Are the two resistors in FIGURE Q28.7 in series or in parallel? Explain.
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3. The circuit in Figure P28.75 contains two resistors,
R1 = 2.00 k2 and R2 = 3.00 kN, and two capacitors,
C = 2.00 µF and C2 = 3.00 µF, connected to a battery with
emf ɛ = 120 V. No charge is on either capacitor before
switch S is closed. Determine the charges q1 and q2 on
capacitors C1 and C2, respectively, after the switch is closed.
(Suggestion: First reconstruct the circuit so that it becomes a
simple RC circuit containing a single resistor and single
capacitor in series, connected to the battery, and then deter-
mine the total charge qstored in the equivalent circuit.)
%3D
%3D
%3D
R1
R2
C2
S
Figure P28.75
?
A circuit consisting of three ideal batteries with voltages 1,
82, and 83, and three ideal resistors with resistances R₁, R₂,
and R3, is shown in the figure.
81 = 34.0 V, E2 = 15.0 V, 83 = 28.5 V
R₁ = 2.90 kn, R₂ = 22.5 k2, R3 = 6.00 k
Calculate the current Ip through point P. Let the sign of the
current correspond to its direction, with "up" being positive.
ww
Ip =
P
R₁
E₁
+
+ 82
ww
R₂
R₂
E3
+
mA
Chapter 28 Solutions
PHYS 212 FOR SCI+ENG W/MAST PHYS >ICP<
Ch. 28 - Rank in order, from largest to smallest, the...Ch. 28 - The tip of a flashlight bulb is touching the top...Ch. 28 - The wire is broken on the right side of the...Ch. 28 - The circuit of FIGURE Q28.4 has two resistors,...Ch. 28 - The circuit of FIGURE Q28.5 has two resistors,...Ch. 28 - Rank in order, from largest to smallest, the...Ch. 28 - Are the two resistors in FIGURE Q28.7 in series or...Ch. 28 - A battery with internal resistance r is connected...Ch. 28 - Initially bulbs A and B in FIGURE Q28.9 are...Ch. 28 - Bulbs A. B, and C in FIGURE Q28.1O axe identical,...
Ch. 28 - Bulbs A and B in FIGURE Q28.11 are identical, and...Ch. 28 - Prob. 12CQCh. 28 - FIGURE Q28.13 shows the voltage as a function of...Ch. 28 - Prob. 1EAPCh. 28 - Draw a circuit diagram for the circuit of FIGURE...Ch. 28 - Prob. 3EAPCh. 28 - Prob. 4EAPCh. 28 - a. What are the magnitude and direction of the...Ch. 28 - What is the magnitude of the potential difference...Ch. 28 - Prob. 7EAPCh. 28 - Prob. 8EAPCh. 28 - A 60 W lightbulb and a 100 W lightbulb are placed...Ch. 28 - Prob. 10EAPCh. 28 - The five identical bulbs in FIGURE EX2B.11 are all...Ch. 28 - Prob. 12EAPCh. 28 - Prob. 13EAPCh. 28 - A typical American family uses kWh of electricity...Ch. 28 - A waterbed heater uses 450 W of power. It is on 25...Ch. 28 - Prob. 16EAPCh. 28 - Prob. 17EAPCh. 28 - Prob. 18EAPCh. 28 - 19. The voltage across the terminals of a V...Ch. 28 - Prob. 20EAPCh. 28 - Prob. 21EAPCh. 28 - 22. Two of the three resistors in FIGURE EX28.22...Ch. 28 - What is the value of resistor R in FIGURE EX28.23?Ch. 28 - Prob. 24EAPCh. 28 - What is the equivalent resistance between points a...Ch. 28 - What is the equivalent resistance between points a...Ch. 28 - Prob. 27EAPCh. 28 - Prob. 28EAPCh. 28 - Prob. 29EAPCh. 28 - Prob. 30EAPCh. 28 - Prob. 31EAPCh. 28 - Prob. 32EAPCh. 28 - Prob. 33EAPCh. 28 - What is the time constant for the discharge of the...Ch. 28 - A 10F capacitor initially charged to 20C is...Ch. 28 - Prob. 36EAPCh. 28 - Prob. 37EAPCh. 28 - A capacitor is discharged through a resistor. The...Ch. 28 - Prob. 39EAPCh. 28 - 40. A refrigerator has a 1000 W compressor, but...Ch. 28 - Prob. 41EAPCh. 28 - An electric eel develops a potential difference...Ch. 28 - You have a resistor, a resistor, a resistor, and a...Ch. 28 - A 2.0 -m-long, 1.0 -mm-diameter wire has a...Ch. 28 - What is the equivalent resistance between points a...Ch. 28 - What are the emf and internal resistance of the...Ch. 28 - A string of holiday lights can be wired in series,...Ch. 28 - The circuit shown in FIGURE P28.48 is inside a 15...Ch. 28 - Suppose you have resistors 2.5,3.5, and 4.5 and a...Ch. 28 - A lightbulb is in series with a resistor. The...Ch. 28 - Prob. 51EAPCh. 28 - Prob. 52EAPCh. 28 - Prob. 53EAPCh. 28 - Prob. 54EAPCh. 28 - What are the battery current Ibatand the potential...Ch. 28 - A battery is a voltage source, always providing...Ch. 28 - A circuit you’re building needs an ammeter that...Ch. 28 - For the circuit shown in FIGURE P28.58, find the...Ch. 28 - For the circuit shown in FIGURE P28.59, find the...Ch. 28 - For the circuit shown in FIGURE P28.60, find the...Ch. 28 - What is the current through the 20 resistor in...Ch. 28 - For the circuit shown in FIGURE P28.62, find the...Ch. 28 - What is the current through the 10 resistor in...Ch. 28 - For what emf does the 200 resistor in FIGURE...Ch. 28 - Prob. 65EAPCh. 28 - Prob. 66EAPCh. 28 - Prob. 67EAPCh. 28 - II A circuit you're using discharges a 20F...Ch. 28 - A 150F defibrillator capacitor is charged to 1500V...Ch. 28 - Prob. 70EAPCh. 28 - A 0.25F capacitor is charged to 50 V. It is then...Ch. 28 - Prob. 72EAPCh. 28 - Prob. 73EAPCh. 28 - The capacitors in FIGURE P28.74 are charged and...Ch. 28 - Prob. 75EAPCh. 28 - Prob. 76EAPCh. 28 - Prob. 77EAPCh. 28 - Prob. 78EAPCh. 28 - Prob. 79EAPCh. 28 - Prob. 80EAPCh. 28 - Prob. 81EAPCh. 28 - Prob. 82EAP
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- (a) Determine the equilibrium charge on the capacitor in the circuit of Figure P27.46 as a function of R. (b) Evaluate the charge when R = 10.0 . (c) Can the charge on the capacitor be zero? If so, for what value of R? (d) What is the maximum possible magnitude of the charge on the capacitor? For what value of R is it achieved? (c) Is it experimentally meaningful to take R = ? Explain your answer. If so, what charge magnitude does it imply? Figure P27.46arrow_forwardThe resistance between terminals a and b in Figure P27.36 is 75.0 . If the resistors labeled R have the same value, determine R. Figure P27.36arrow_forwardThe- pair of capacitors in Figure P28.63 are fully charged by a 12.0-V battery. The battery is disconnected, and the switch is then closed. Alter 1.00 ms has elapsed, (a) how much charge remains 011 the 3.00-F capacitor? (b) How much charge remains on the 2.00-F capacitor? (c) What is the current in the resistor at this time?arrow_forward
- A resistor R1 is connected in parallel with a second resistor R2 = 0.5R1. This parallel configuration is then connected in series with R3 = 2R1 and across a cell with voltage V = 9V. What is the potential difference across the parallel resistor pair? Select one: a. 1.29 V b. 1.5 V c. 2.25 V d. 7.5 Varrow_forwardThe circuit in Figure P27.41 contains two resistors, R1 = 2.00 kΩ and R2 = 3.00 kΩ, and two capacitors, C1 = 2.00 μF and C2 = 3.00 μF, connected to a battery with emf ε = 120 V. If there are no charges on the capacitors before switch S is closed, determine the charges on capacitors (a) C1 and (b) C2 as functions of time, after the switch is closed.arrow_forwardHow long will it take a charged 80 µF capacitor to lose 33% of its initial energy when it is allowed to discharge through a 45 Q resistor? O a. 2.00 ms O b. 0.72 ms O. 1.44 ms O d. 3.99 ms O e. 0.44 msarrow_forward
- 3. A 30µF capacitor is connected in series to a 1000 resistor. Initially the capacitor is not charged. At time = Os they are connected in series to a 36V battery. What is the voltage across the capacitor after 2.5ms? a. b. What is the maximum charge on the capacitor as t>∞? C. The capacitor is completely charged and the battery disconnected. The resistor is connected in series with the charged capacitor. How long does it take for 85% of the capacitor's charge to discharge through the resistor?arrow_forwardAn uncharged capacitor with C=43μF and a resistor with R=75Ω are connected in series with a battery of ϵ=7.5 V. a. Express the time constant τ in terms of R and C. b. Calculate the numerical value of τ in microseconds. c. Express the maximum charge Q on the capacitor in terms of C and ϵ. d. Calculate the numerical value of Q in microcoulombs.arrow_forwardq14arrow_forward
- what is the answer!?arrow_forwardAnswer the the question:arrow_forward20. A circuit consists of a 100 v battery connected in series to a 20 resistor and two 2 F capacitors. The two capacitors are connected in parallel. What is the current out of the battery at t = 25 seconds? A. 1.3 A B. 2.8 A C. 3.7 A D. 4.1 A Thearrow_forward
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