A conducting wire loop in the shape of a circle of radius r is at rest in a the ry-plane. A uniform magnetic field fills the space and points in the positive 2 direction. (a) Make a simple sketch showing the circular wire loop and the magnetic field. (b) Calculate the magnetic flux through the loop. (c) If the radius of the loop expands at a rate v = dr/dt, determine the induced emf, E, in the loop and indicate the direction of the induced current.

A conducting wire loop in the shape of a circle of radius r is at rest in a the ry-plane. A uniform magnetic field fills the space and points in the positive 2 direction. (a) Make a simple sketch showing the circular wire loop and the magnetic field. (b) Calculate the magnetic flux through the loop. (c) If the radius of the loop expands at a rate v = dr/dt, determine the induced emf, E, in the loop and indicate the direction of the induced current.