Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 28, Problem 25SP
Three resistors, of 40 Ω, 60 Ω, and 120 Ω, are connected in parallel, and this parallel group is connected in series with 15 Ω in series with 25 Ω. The whole system is then connected to a 120-V source. Determine (a) the current in the 25 Ω, (b) the potential drop across the parallel group, (c) the potential drop across the 25 Ω, (d) the current in the 60 Ω, (e) the current in the 40 Ω.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
1. A 10 μF capacitor is connected in series with a 5 Ω resistor and a battery of negligible internal resistance and emf 6 V. After a long time, if the charging battery is removed and the capacitor is immediately connected across the 5 Ω resistor, the initial value of the discharge current is
a. 1.2b. 0.6c. 0.3d. 0.832. Resistances of 2.0 Ω, 4.0 Ω, and 6.0 Ω and a 24-V emf device are all in parallel. The current in the 2.0-Ω resistor is:
3. Solve and find the value of I
You connect a 10.0 MΩ resistor in series with a 3.20 mFcapacitor and a battery with emf 9.00 V. Before you close the switchat t = 0 to complete the circuit, the capacitor is uncharged. Find the fraction of the initial current present at t = 18.0 s
A straight, cylindrical wire lying along the x axis has a length of 0.515 m and a diameter of 0.195 mm. It is made of a material described by Ohm's law with a resistivity of ? = 4.00 ✕ 10−8 Ω · m. Assume a potential of 4.00 V is maintained at the left end of the wire at x = 0. Also assume V = 0 at x = 0.515 m.
(a) Find the magnitude (in V/m) and direction of the electric field in the wire.
(b) Find the resistance of the wire (in Ω).
(c) Find the magnitude (in A) and direction of the electric current in the wire.
(d) Find the current density in the wire (in MA/m2).
See image for the full question.
Chapter 28 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 28 - Prob. 18SPCh. 28 - 19. Compute the equivalent resistance of (a) 3.0...Ch. 28 - 20. What resistance must be placed in parallel...Ch. 28 - 21. How many 160-Ω resistors (in parallel) are...Ch. 28 - 28.22 [II] Three resistors, of 8.0, 12, and 24,...Ch. 28 - Prob. 24SPCh. 28 - 25. Three resistors, of 40 Ω, 60 Ω, and 120 Ω, are...Ch. 28 - Prob. 26SPCh. 28 - 27. A 36-Ω galvanometer is shunted by a resistor...Ch. 28 - 28.28 [II] A relay having a resistance of 6.0 ...
Ch. 28 - 28.29 [II] Show that if two resistors are...Ch. 28 - 28.30 [II] For the circuit shown in Fig. 28-13,...Ch. 28 - 28.31 [II] For the circuit shown in Fig. 28-14,...Ch. 28 - 28.32 [II] It is known that the potential...Ch. 28 - 28.33 [II] In the circuit shown in Fig. 28-16,...Ch. 28 - 28.34 [II] For the entire circuit shown in Fig....Ch. 28 - 28.35 [II] In the circuit shown in Fig. 28-18, the...Ch. 28 - 36. The Wheatstone bridge shown in Fig. 28-19 is...Ch. 28 - 37. The slidewire Wheatstone bridge shown in Fig....Ch. 28 - 28.38 [II] Referring to the circuit in Fig. 28-21,...Ch. 28 - 28.39 [II] Referring to the circuit in Fig. 28-22,...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a current of1 = 2.00 A is accidentally passed through a R=1.00 resistor rated at 1 W, what would be the most probable outcome? Is there anything that can be done to prevent such an accident?arrow_forwardIf the terminals of a battery with zero internal resistance are connected across two identical resistors in series, the total power delivered by the battery is 8.00 W. If the same battery is connected across the same resistors in parallel, what is the total power delivered by the battery? (a) 16.0 W (b) 32.0 W (c) 2.00 W (d) 4.00 W (e) none of those answersarrow_forwardPower P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?arrow_forward
- Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?arrow_forwardA 9V battery with internal resistance of 0.5Ω is connected across a 3 Ω and a 5 Ω resistor. The potential drop across the 5 Ω resistor is (a) 4.42 V (b) 9V (c) 3.176 V (d) 6.569 V (e) 5.294 Varrow_forwardTwo 6.0 µF capacitors, two 2.2 kΩ resistors, and a 12.5 V source are connected in series. Starting from the uncharged state, how long does it take for the current to drop from its initial value to 1.30 mA?arrow_forward
- A person with a body resistance of 10 kΩkΩ between his hands accidentally grasps the terminals of a 14.0 kVkV power supply. If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in the situation just described to be 1.25 mAmA or less?arrow_forwardAn initially uncharged 4.39 μF4.39 μF capacitor and a 7.65 kΩ7.65 kΩ resistor are connected in series to a 1.50 V1.50 V battery that has negligible internal resistance. What is the initial current in the circuit, expressed in milliamperes? Calculate the circuit's time constant in milliseconds. How much time, in milliseconds, must elapse from the closing of the circuit for the current to decrease to 2.77%2.77% of its initial value?arrow_forwardConsider a cylindrical ohmic wire with the following dimensions: length = 10.0 m, radius = 0.05 m. When the ends of the wire were connected to a 2.0 V voltage source, a 1.0 A current through the wire was measured. Determine the resistivity of the wire. Choices: 3.93 x10^-4 Ω-m, 1.57 x 10^-3 Ω-m, 3.14 x 10^-2 Ω-m, 3.92 x 10^-2 Ω-m, 1.57 x 10^-1 Ω-marrow_forward
- A battery with EMF of 20 V and an internal resistance, r = 0.02 ohms is connected to the load resistances, R1 = 115 ohms, R2 = 147 ohms and R3 = 25 ohms. Determine the total current flowing in the circuit.arrow_forwardA capacitor that is initially uncharged is connected in series with a resistor and an emf source with EEEMF = 110 VV and negligible internal resistance. Just after the circuit is completed, the current through the resistor is 6.6×10−5 AA. The time constant for the circuit is 4.3 s.What is the resistance of the resistor?arrow_forwardA capacitor with a capacitance of 3.5 μF is initially uncharged. It is connected in series with a switch of negligible resistance, a resistor with a resistance of 19.5 kΩ, and a battery that has a potential difference of 155 V. Immediately after the switch is closed, what is the current, in amperes, through the resistor?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
How To Solve Any Resistors In Series and Parallel Combination Circuit Problems in Physics; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=eFlJy0cPbsY;License: Standard YouTube License, CC-BY