The plane of loop with dimensions 19 cm x 8 cm is initially perpendicular to a uniform 0.3 T magnetic field. Find the change in flux through the loop if it is turned through 100 degrees about an axis perpendicular to the field lines in the ccw direction.

A 18.4-cm-diameter coil consists of 20 turns of circular copper wire 9.96 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 3.506E-3 T/s. Determine the current in the loop, in A.

Chapter 30, Problem 023SN The figure shows two parallel loops of wire having a common axis. The smaller loop (radius r) is above the larger loop (radius R) by a distance x>>R. Consequently, the magnetic field due to the counterclockwise current / in the larger loop is nearly constant throughout the smaller loop. Suppose that x is increasing at the constant rate dx/dt = v. (a) Find an expression for the magnetic flux through the area of the smaller loop as a function of x. In the smaller loop, find (b) an expression for the magnitude of the induced emf and (c) the direction of the induced current. R. (a) ? ENI (ь) 2 Edit (c)

A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.28 m. The normal to the plane of the loop is parallel to a constant magnetic field (p = 0°) of magnitude 0.82 T. What is the change AO in the magnetic flux that passes through the loop when, starting with the position shown in the drawing, the semicircle is rotated through half a revolution? B (into paper) ΔΦ = i