23.2 Faraday’s Law of Induction: Lenz’s Law
Induced emf set by how fast flux changes and by the number of turns, with the minus sign that makes induction oppose its own cause.
College Physics 2e, 23.2 Faraday’s Law of Induction: Lenz’s Law
3 exercises
23.2 Exercise 9
(a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner’s 2.00 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 0.250 s to move it into the field. (b) Discuss whether this current would significantly change the temperature of the r…
23.2 Exercise 11
An emf is induced by rotating a 1000-turn, 20.0 cm diameter coil in the Earth’s magnetic field. What average emf is induced, given the plane of the coil is originally perpendicular to the Earth’s field and is rotated to be parallel to the field in 10.0 ms?
Integrated Concepts
Approximately how does the emf induced in the loop in the figure(b) depend on the distance of the center of the loop from the wire?
Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.