Student Workbook for Physics for Scientists and Engineers: A Strategic Approach, Vol 1. (Chs 1-21)
4th Edition
ISBN: 9780134110646
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Textbook Question
Chapter 28, Problem 11CQ
Bulbs A and B in FIGURE Q28.11 are identical, and both are glowing. Bulb B is removed from its socket. Does the potential difference
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Initially, bulbs A and B shown are both glowing. Bulb B is then removed from its socket. Does removing bulb B cause the potential difference ΔV12 between points 1 and 2 to increase, decrease, stay the same, or become zero? Explain.
A pair of capacitors C1 = 39.0 µC and C2 = 24.0 µC are connected to a battery V = 54.0 V and a switch.
The capacitors are initially uncharged. After the switch has been closed and the capacitors are fully charged,
what is the ratio V2/Vị of the voltages across the capacitors, where Vị is the voltage across C1 and V2 is the
voltage across C2?
C1
C2
Vp
O (a) 0.615
O (b) 1.62
O (c) 0.379
O (d) 2.64
О (e) 1
1. It consists of two concentric spherical shells
of radii r1 = 9.5cm and r2 > r1. The capacitance
of the capacitor is given as 110 pF. 100 V
potential difference between spherical shells
What is the surface charge density of the
spherical shell with radius r2, C/m2? is it?
2.A current of 1.67 A flows through a 70 cm long
copper wire with a radius of 0.51 mm. Copper
free electron density of the wire 8.5 x 1028
electrons/m3 since an electron is a wire How
long does it take to get from one end to the
other? ( The charge of the electron is 1.6 x 10
-19C)
%3D
Note: ɛ0 = 8.85 × 10^ -12 C^ 2
%3D
/Nm^2 ve u0 = 47t × 10^ -7 Tm/A
Chapter 28 Solutions
Student Workbook for Physics for Scientists and Engineers: A Strategic Approach, Vol 1. (Chs 1-21)
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 charge Q is placed on a capacitor of capacitance C. The capacitor is connected into the circuit shown in Figure P26.37, with an open switch, a resistor, and an initially uncharged capacitor of capacitance 3C. The switch is then closed, and the circuit comes to equilibrium. In terms of Q and C, find (a) the final potential difference between the plates of each capacitor, (b) the charge on each capacitor, and (c) the final energy stored in each capacitor. (d) Find the internal energy appearing in the resistor. Figure P26.37arrow_forward(a) Calculate the potential difference between points a and b in Figure P27.37 and (b) identify which point is at the higher potential. Figure P27.37arrow_forwardTwo capacitors with C1 ≠ C2 are connected to a battery as shown in the figure. Which statement about the charge on each capacitor and the voltage across each capacitor is best? The charges on the capacitors are equal, but the voltages across the capacitors are unequal. A clear statement about the charges on the capacitors and the voltages across the capacitors cannot be made unless we know the numeric value of the EMF of the battery. A clear statement about the charges on the capacitors and the voltages across the capacitors cannot be made unless we know the numeric values of the capacitances. A clear statement about the charges on the capacitors and the voltages across the capacitors cannot be made unless we know the numeric values of the capacitances and the EMF of the battery. The charges on the capacitors are unequal, and the voltages across the capacitors are also unequal. The charges on the capacitors are equal, and so…arrow_forward
- If 5.0 x 1021 electrons pass through a 20.2 Q resistor in 10 min, what is the potential difference across the resistor? use the charge of the electron to be -1.6 x 1019 Carrow_forwardIf 5.0 × 1021 electrons pass through a 30.1 Q resistor in 10 min, what is the potential difference across the resistor? use the charge of the electron to be -1.6 x 10-19 c. Select one: A. 6.02 B. 2408.00 C. 40.13 D. 240.80 E. 10.03arrow_forwardE2 R1 R2 2. Find the charge on the capacitor after the switch has been left open for some time, then closed for some period of time. We can assume that C = 2 µF, with batteries of values E1 R2 = 0.25 N. 2V and E2 =1V, and resistor values R1 = 0.5 N and Sarrow_forward
- + 100 V A B C₁ 10 uF C₂ C₂ 20.5 UF 37.5 uf T Initially the switch in the circuit depicted above is in position A and capacitors C₂ and C3 are uncharged. Then the switch is flipped to position B. What are the charges on and the potential difference across each of the three capacitors? Note1: The capacitor values in the Figure above are all in µF.arrow_forwardA2.0 µF capacitor is charged to 12 Vand then discharged througha 4.0 M2 resistor. How long will it take for the voltage across the capacitor to drop to 3.0v? Hint: The unknown time is in "log jail". Break it out with the inverse function of the exponential. O 8.0 s O 24 s O 11 s O 22 sarrow_forwardThe circuit in the figure below has been connected for a long time. Let R, 8.80 N and R, 3.80 Q. 1.00 N 1.00 µF 10.0 V R2 2.00 N (a) What is the potential difference across the capacitor? V (b) If the battery is disconnected from the circuit, over what time interval does the capacitor discharge to one-tenth its initial voltage? usarrow_forward
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