Magnetic Flux, Induction, and Ampere's Circuital Law
A closed loop of wire that consists of a semicircle of radius and a straight line, as shown in the above figure, is lying in a uniform magnetic field of magnitude The magnetic field is perpendicular to the straight line of the loop and makes an angle of with the plane of the semicircle. If the magnetic field is reduced to zero at a uniform rate during a time interval of what is the approximate magnitude of the electromotive force induced in the loop during this interval?
Suppose that an elastic conducting material, which is placed in a uniform magnetic field, is stretched into a circle loop with radius The plane of the loop is perpendicular to the magnetic field, and the stretched loop is released to shrink at an instantaneous rate of What is the approximate magnitude of the electromotive force induced in the shrinking loop?
A circular wire loop with radius is lying in a magnetic field with magnitude The plane of the loop is perpendicular to the magnetic field. If the direction of the magnetic field is reversed and its magnitude is reduced to in what is the approximate magnitude of the average induced electromotive force in the loop during this time interval?
Consider a conducting loop of a half-circle of radius as shown in the above figure. The loop lies in a uniform magnetic field that is directed out of the screen. If the field magnitude is given by where is in teslas and is in seconds, what is the approximate magnitude of the electromotive force induced around the loop by that field at
A rectangular loop of wire is immersed in a nonuniform and varying magnetic field that is perpendicular to and directed into the screen, as shown in the above figure. The loop has width and height If the magnitude of the magnetic field is given by where is in teslas, is in seconds, and is in meters, what is the magnitude of the induced electromotive force around the loop at