EBK PHYSICS OF EVERYDAY PHENOMENA
8th Edition
ISBN: 8220106637050
Author: Griffith
Publisher: YUZU
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Textbook Question
Chapter 14, Problem 29CQ
Under which conditions are inductive detectors more effective than simple timer systems—when the traffic is heavy in all directions at all times or when the traffic varies with time of day and other factors? Explain. (See everyday phenomenon box 14.2.)
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Chapter 14 Solutions
EBK PHYSICS OF EVERYDAY PHENOMENA
Ch. 14 - The north pole of a handheld bar magnet is brought...Ch. 14 - If the distance between the south poles of two...Ch. 14 - In what respects is the force between two magnetic...Ch. 14 - Is it possible for a bar magnet to have just one...Ch. 14 - Does a compass needle always point directly...Ch. 14 - If we regard the Earth as a magnet, does its...Ch. 14 - We visualized the magnetic field of the Earth by...Ch. 14 - A horizontal wire is oriented along a north-south...Ch. 14 - A horizontal wire is oriented along an east-west...Ch. 14 - Is the force exerted by one current-carrying wire...
Ch. 14 - A uniform magnetic field is directed horizontally...Ch. 14 - A positively charged particle is momentarily at...Ch. 14 - If a uniform magnetic field is directed...Ch. 14 - Why does the magnetic force on a current-carrying...Ch. 14 - If we look down at the top of a circular loop of...Ch. 14 - If we were to represent the current loop of...Ch. 14 - A current-carrying rectangular loop of wire is...Ch. 14 - If the rectangular loop of wire shown in question...Ch. 14 - Because the magnetic fields of a coil of wire and...Ch. 14 - In what respect is a simple ammeter designed to...Ch. 14 - Does an ac motor require a split-ring commutator...Ch. 14 - Which type of motor typically runs at a fixed...Ch. 14 - If Faraday wound enough turns of wire on the...Ch. 14 - Is a magnetic flux the same as a magnetic field?...Ch. 14 - A horizontal loop of wire has a magnetic field...Ch. 14 - Suppose the magnetic flux through a coil of wire...Ch. 14 - Two coils of wire are identical except that coil....Ch. 14 - Do the sensors that detect vehicles at stoplights...Ch. 14 - Under which conditions are inductive detectors...Ch. 14 - If the magnetic field produced by the magnets in a...Ch. 14 - Does a simple generator produce a steady direct...Ch. 14 - A simple generator and a simple electric motor...Ch. 14 - Can a transformer be used, as shown in the...Ch. 14 - By stepping up the voltage of an...Ch. 14 - Prob. 1ECh. 14 - Prob. 2ECh. 14 - Prob. 3ECh. 14 - Prob. 4ECh. 14 - Prob. 5ECh. 14 - Prob. 6ECh. 14 - Prob. 7ECh. 14 - Prob. 8ECh. 14 - Prob. 9ECh. 14 - Prob. 10ECh. 14 - Prob. 11ECh. 14 - Prob. 12ECh. 14 - Prob. 13ECh. 14 - Prob. 14ECh. 14 - Prob. 15ECh. 14 - Prob. 16ECh. 14 - Prob. 1SPCh. 14 - Prob. 2SPCh. 14 - Prob. 3SPCh. 14 - Prob. 4SP
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- Please help with Q8arrow_forwardSuppose that the light bulb in Figure 22.4b is a 60.0-W bulb with a resistance of 287 Ω. The magnetic field has a magnitude of 0.785 T, and the length of the rod is 1.02 m. The only resistance in the circuit is that due to the bulb. What is the shortest distance along the rails that the rod would have to slide for the bulb to remain lit for one-half second?arrow_forwardConsider a transformer, used to recharge rechargeable flashlight batteries, that has 500 turns in its primary coil, 7 turns in its secondary coil, and an input voltage of 120 V. Randomized Variable n = 7 a) What is the voltage output Vs, in volts, of the transformer used for to charge the batteries? b) What input current Ip, in milliamps, is required to produce a 4.8 A output current? c) What is the power input, in watts?arrow_forward
- Question 4arrow_forwardThe lightbulb in the circuit shown in the figure(Figure 1) has a resistance of 11 2 and consumes 0.1 W of power; the rod is 1.11 m long and moves to the left with a constant speed. The strength of the magnetic field is 1.7 T. You may want to review (Pages 819-821). Figure O O O O O eneral magen Express your answer using two significant figures. 1= 0.91 A Answer Requested Here we leam how to determine the current in the circuit from the resistance and power of a lightbulb Part B Previous Answers Find the speed of the rod. Express your answer using two significant figures. 195] ΑΣΦΑ m/s You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Provide Feedback Previous Answers Request Answerarrow_forward#3. (a) Explain elaborately the factors affecting the magnitude of the induced emf in electricity generation. (b)Explain elaborately how can the motion of a charged particle be used to distinguish between an amagnetic field and an electric field?arrow_forward
- A voltage generated by moving a magnet in a coil of wire is called "induced voltage." True O Falsearrow_forwardA spacecraft orbiting the Earth has a coil of wire in it. An astronaut measures a small current in the coil, although there is no battery connected to it and there are no magnets on the spacecraft. What is causing the current?arrow_forwardA particle passes through a mass spectrometer as illustrated in the figure below. The electric field between the plates of the velocity selector has a magnitude of 8020 V/m, and the magnetic fields in both the velocity selector and the deflection chamber have magnitudes of 0.0918 T. In the deflection chamber the particle strikes a photographic plate 58.0 cm removed from its exit point after traveling in a semicircle. a) What is the mass-to-charge ratio of the particle? b) What is the mass of the particle if it is doubly ionized? c) What is its identity, assuming it's an element? (Enter the name of an element.)arrow_forward
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What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY