Electromagnetic Induction

A coil is places perpendicular to a magnetic field of \(5000 \mathrm{~T}\). When the field is changed to \(3000 \mathrm{~T}\) in \(2 \mathrm{~s}\), an induced emf of \(22 \mathrm{~V}\) is produced in the coil. If the diameter of the coil is \(0.02 \mathrm{~m}\), then the number of turns in the coil is: