In a physics laboratory experiment a coil with $160$ turns and closed in an area of $13\mathrm{.}2$ cm rotated during the time interval $4\mathrm{.}9*10^-2$s from a position and which its play is perpendicular to Earth's magnetic field to one in which its plate is parallel to the field. The magnitude of the Earth's magnetic field at the lab location is $5\mathrm{.}6*10^-5$