Transcranial magnetic stimulation (TMS) is a non-invasive method employed to stimulate areas of the human brain. A small coil is positioned on the scalp, and a concise burst of current in the coil generates a rapidly changing magnetic field in the brain. The induced emf can be enough to stimulate the neuronal activity. One such device produces a magnetic field in the brain that increases from zero to 1.5T in 120 msec. Find out the induced emf in a circle of tissue of radium 1.6 mm which is perpendicular to the direction of the field.