A magnetic field passing through two coils of the same diameter and length decreases from a magnitude of
Want to see the full answer?
Check out a sample textbook solutionChapter 21 Solutions
Pearson eText for College Physics: Explore and Apply -- Instant Access (Pearson+)
Additional Science Textbook Solutions
College Physics (10th Edition)
The Cosmic Perspective
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
College Physics: A Strategic Approach (3rd Edition)
Physics (5th Edition)
Essential University Physics: Volume 1 (3rd Edition)
- A single-turn circular loop of wire of radius 50 mm lies in a plane perpendicular to a spatially uniform magnetic field. During a 0.10-s time interval, the magnitude of the field Increases uniformly from 200 to 300 mT. (a) Determine the emf Induced in the ioop. (b) If the magnetic field is directed out of the page, what is the direction of the cun-ent induced in the loop?arrow_forwardDesign a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will produce an emf =0 sin t. where 0=110V and 0=110V .arrow_forwardA thin conducting bar (60.0 cm long) aligned in the positive y direction is moving with velocity v=(1.25m/s)i in a region with a spatially uniform 0.400-T magnetic field directed at an angle of 36.0 above the xy plane. a. What is the magnitude of the emf induced along the length of the moving bar? b. Which end of the bar is positively charged?arrow_forward
- In the circuit sho in the accompanying figure, the rtd slides along the conducting rails at a constant VelOCity v. The velocity is in the same plane as the rails and directed at an angle 6 to them. A uniform magnetic field Bis directed out of the page. What is the emf induced in the r?arrow_forwardTwo long, parallel wires cy equal currents in opposite directions. The radius of each wire is a, and the distance between the centers of the wires is d, Show that if the magnetic flux within the wires themselves can be ignored, the self-inductance of a length 1 of such a pair of wires is L 0 l in d1 a (Hint Calculate the magnetic flux through a rectangle of length 1 between the wires and then use L=N/Iarrow_forwardA coil with 50 turns and area 10cm2 is oriented with its plane perpendicular to a 0.75-T magnetic field. If the coil is flipped over (rotated through 180°) in 0.20 s, what is the average emf induced in it?arrow_forward
- The normal to tt plane of a single-turn conducting loop is directed at an angle to a spatially uniform magnetic field B. It has a fixed area and orientation relative to the magnetic fleck Show that the emf induced In the loop is given by i = (dB/dt)(Acos),where A is the area of the loop.arrow_forwardthe magnetic field starts with a strength (B) of 50 mT into the paper and it decreases to zero and ends up changing direction to be 10 mT out of the paper in 2 ms. If a coil of square loops of wire parallel to the plane of the paper that is 10 cm on a side experiences that B change, how many loops must there be to get a total emf of 10 V?arrow_forwarda)An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner’s 4.40 T field with his fingers pointing in the direction of the field. Find the average emf induced in his wedding ring, given its diameter is 2.20 cm and assuming it takes 0.35 s to move it into the field. Express answer in mV to two decimal places. b)From the perspective of the technician, what is the direction of the induced current?arrow_forward
- When a magnetic field is first turned on, the flux through a 35-turn loop varies with time according to 4m = 9.ot2 - 7.0t, where 4, is in milliwebers, t is in seconds, and the loop is in the plane of the page with the unit normal pointing outward. (a) What is the emf (in mv) induced in the loop as a function of time? (Use the following as necessary: t. Do not include units in your answer.) E = What is the direction of the induced current at the following times? (b) t = 0s O clockwise O counterclockwise O The magnitude is zero. (c) t = 0.10 s clockwise counterclockwise The magnitude is zero. (d) t = 1.0 s O clockwise counterclockwise O The magnitude is zero. (e) t = 2.0 s O clockwise counterclockwise O The magnitude is zero.arrow_forwardA 109 turn circular coil of radius 2.01 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Over an interval of 0.127 s, the magnetic field strength increases from 57.5 mT to 90.1 mT. Find the magnitude of the average emf Eag induced in the coil during this time interval, in millivolts. Ewg mVarrow_forwardA prototype of an MRI consists of a set of 400 coils each having a radius of 0.30 m. To test its efficiency a 1.2 T magnetic field oriented perpendicular to the plane of the coils is shut off over a 3.6 second time interval. The induced current in the coils is measured to be 5.8 A. What is the resistance of the coils?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill