Inductive charging is used to wirelessly charge electronic devices ranging from toothbrushes to cell phones. Suppose the base unit of an inductive charger produces a 1.30 ✕ 10−3 T magnetic field. Varying this magnetic field magnitude changes the flux through an 18.0-turn circular loop in the device, creating an emf that charges its battery. Suppose the loop area is 2.75 ✕ 10−4 m2 and the induced emf has an average magnitude of 5.20 V. Calculate the time required (in s) for the magnetic field to decrease to zero from its maximum value.