![College Physics: A Strategic Approach (3rd Edition)](https://www.bartleby.com/isbn_cover_images/9780321879721/9780321879721_largeCoverImage.gif)
Wireless Power Transmission
Your laptop has wireless communications connectivity, and you might even have a wireless keyboard or mouse. But there’s one wire you haven’t been able to get rid of yet—the power cord.
Researchers are working on ways to circumvent the need for a direct electrical connection for power, and they are experiencing some success. Recently, investigators were able to use current lowing through a primary coil to power a 60 W lightbulb connected to a secondary coil 2.0 m away, with approximately 15% efficiency. The coils were large and the efficiency low, but it's a start.
Figure VI.2
The wireless power transfer system is outlined in Figure VI.2. An AC supply generates a current through the primary coil, creating a varying magnetic Held. This field induces a current in the secondary coil, which is connected to a resistance (the lightbulb) and a capacitor that sets the resonance frequency of the secondary circuit to match the frequency of the primary circuit.
At a particular moment, the current in the primary coil is clockwise, as viewed from the secondary coil. At the center of the secondary coil, the field from the primary coil is
- A. To the right.
- B. To the left.
- C. Zero.
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter P Solutions
College Physics: A Strategic Approach (3rd Edition)
Additional Science Textbook Solutions
College Physics (10th Edition)
Conceptual Integrated Science
Physics (5th Edition)
Cosmic Perspective Fundamentals
Physics: Principles with Applications
The Cosmic Perspective Fundamentals (2nd Edition)
- Integrated Concepts (a) What is the average power output of a heart defibrillator that dissipates 400 J of energy in 10.0 ms? (b) Considering the high-power output, why doesn’t the defibrillator produce serious burns?arrow_forwardIntegrated Concepts (a) An aluminum power transmission line has a resistance of 0.0580/km. What is its mass per kilometer? (b) What is the mass per kilometer of a copper line having the same resistance? A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.arrow_forwardSolve Problemarrow_forward
- 5. In the Ohm's Law experiment, you got the following graph for the currents versus potential difference for the following cases Slope = 20 a) Using just one resistor (R1) in the circuit. b) Using just one resistor (R2) in the circuit. c) Using two resistors (R₁ and R₂) in parallel connection. d) Using two resistors (R₁ and R2) in series connection. Find the values of R1 and R2 V (volts) Slope = 6.66 I (A)arrow_forward云 ME History Bookmarks Develop Window Help A openvellum.ecollege.com slie -.. MyLab and Mastering E Assignments P Problems: Current and Resi... M MasteringPhysics Constants ***arrow_forwardHow would the value of each of the four following physical quantities change over time after the switch is closed? Explain why for each case in 1 or 2 sentences. (You may assume that the resistance of the batteries, the wires, and the switch are negligibly small for this question). a. The voltage across the capacitor, VCAP b. The voltage across the light bulb, VBULB c. The current through light bulb, IBULB d. VBULB + VCAParrow_forward1. Three 10 ohm resistors are connected in parallel to a 12 V battery. a. How would the total current in the circuit change if an additional 10 ohm resistor was added and all four resistors were connected in parallel? Explain. b. How would the total current in the circuit change if the circuit was rewired and the three resistors were connected in series? Explain. c. Explain what happens to a magnet if it is dropped? d. Explain why it is necessary to connect a voltmeter in parallel with a load.arrow_forward27 onlyarrow_forwardExplain answer.arrow_forwardQ3. Two identical constant current small loops with radius a are placed a distance d apart according to the figure below. Determine the smallest radius a and the smallest separation d so that nulls are formed in the directions 0 = 0•, 60•, 90•, 120•, and 180•, where 0 is the angle measured from the positive z axis. aarrow_forward. A clamp-on ammeter is placed around a conductor and the meter indicates that there is 10A of current flowing through the conductor. If the wire were wrapped into 10 loops and the clamp-on ammeter were clamped around the 10 loops, what value of current would the clamp-on ammeter indicate? A. 10A B. 1A C. 0A D. 100A I NEED TYPED ANS NOT HANDWRITTEN ANS IN DETAILarrow_forwardQ2) Consider the following picture where l = 100 mm, R = 15 N, and the rod is moving with velocity of 5 a, m/s then perform the following tasks y В in) 2.1 Find Vemf in the rod and I through the resistor if B = 0.8 az Wb/m². 2.2 Find Vemf in the rod and I through the resistor if B = 0.8 cos(10°t – х) а, Wb/m?.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553292/9781337553292_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781133939146/9781133939146_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781133104261/9781133104261_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305116399/9781305116399_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781285737027/9781285737027_smallCoverImage.gif)