the figure below displays a circular loop of aluminum wire in a uniform magnetic field pointing into the page. the radius of the loop is 11.0 cm and the magnitude of the field is 0.160 t. you grab points a and b and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.180 s to do so. what is the magnitude of the average induced emf in the loop (in mv) during this time?