EBK PHYSICS OF EVERYDAY PHENOMENA
8th Edition
ISBN: 8220106637050
Author: Griffith
Publisher: YUZU
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Chapter 14, Problem 30CQ
If the magnetic field produced by the magnets in a generator is constant, does the magnetic flux through the generator coil change when it is turning? Explain.
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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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- A current-carrying coil in a magnetic field experiences a torque that is 75% of the maximum possible torque. What is the angle between the magnetic field and the normal to the plane of the coil?arrow_forwardConstruct Your Own Problem Consider using the torque on a current-carrying coil in a magnetic field to detect relatively small magnetic fields (less than the field of the Earth, for example). Construct a problem in which you calculate the maximum torque on a current- carrying loop in a magnetic field. Among the things to be considered are the size of the coil, the number of loops it has, the current you pass through the coil, and the size of the field you wish to detect. Discuss whether the torque produced is large enough to be effectively measured. Your instructor may also wish for you to consider the effects, if any, of the field produced by the coil on the surroundings that could affect detection of the small field.arrow_forwardA circular coil of five turns and a diameter of 30.0 cm is oriented in a vertical plane with its axis perpendicular to the horizontal component of the Earths magnetic field. A horizontal compass placed at the coils center is made to deflect 45.0 from magnetic north by a current of 0.600 A in the coil. (a) What is the horizontal component of the Earths magnetic field? (b) The current in the coil is switched off. A dip needle is a magnetic compass mounted so that it can rotate in a vertical north-south plane. At this location, a dip needle makes an angle of 13.0s from the vertical. What is the total magnitude of the Earths magnetic field at this location?arrow_forward
- A magnetized sewing needle has a magnetic moment of 9.70 mA m2. At its location, the Earths magnetic field is 55.0 T northward at 48.0 below the horizontal. Identify the orientations of the needle that represent (a) the minimum potential energy and (b) the maximum potential energy of the needlefield system. (c) How much work must be done on the system to move the needle from the minimum to the maximum potential energy orientation?arrow_forwardAn example of magnetohydrodynamics (MHD) comes from the flow of a river (salty water). This fluid interacts with the Earth’s magnetic field to produce a potential difference between the two river banks. How would you go about calculating the potential difference?arrow_forwardA circular loop of wire is held in a uniform magnetic field, with the plane of the loop perpendicular to the field lines. Which of the following will not cause a current to be induced in the loop? (a) crushing the loop (b) rotating the loop about an axis perpendicular to the field lines (c) keeping the orientation of the loop fixed and moving it along the field lines (d) pulling the loop out of the fieldarrow_forward
- Integrated Concepts To construct a nonmechanical water meter, a 0.500T magnetic field is placed across the supply water pipe to a home and the Hall voltage is recorded. (a) Find the flow rate in liters per second through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV. (b) What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?arrow_forwardA strong electromagnet produces a uniform magnetic field of 1.60 T over a cross-sectional area of 0.200 m2. A coil having 200 turns and a total resistance of 20.0 is placed around the electromagnet. The current in the electromagnet is then smoothly reduced until it reaches zero in 20.0 ms. What is the current induced in the coil?arrow_forwardA uniform horizontal wire with a linear mass density of 0.50 g/m carries a 2.0-A current. It is placed in a constant magnetic field with a strength of 4.0 103 T. The field is horizontal and perpendicular to the wire. As the wire moves upward starting from rest, (a) what is its acceleration and (b) how long does it take to rise 0.50 m? Neglect the magnetic field of Earth.arrow_forward
- Unreasonable results To construct a non-mechanical water meter, a 0.500-T magnetic field is placed across the supply water pipe to a home and the Hall voltage is recorded, (a) Find the flow rate through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV. (b) What would the Hail voltage be for the same flow rate through a 10,0-cm- diameter pipe with tire same field applied?arrow_forwardWhat is the value of the magnetic flux through the coil in Figure 23.56 (b) due to the wire?arrow_forwardMake a drawing and use RHR—2 to find the direction of the magnetic field of a current loop in a motor (such as in Figure 22.34). Then show that the direction of the torque on the loop is the same as produced by like poles repelling and unlike poles attracting.arrow_forward
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