An inductor in an electric circuit is essentially a coil of wire in which the voltage is affected by a changing current. By definition, the voltage caused by the changing current is given by VL = L(di / dt), where L is the inductance (in H). If VL =21.0 -0.5t for a 3.0-H inductor, find the current in the circuit after 40 s if the initial current was zero. After 40 s, the current is |A. Type an integer or decimal rounded to one decimal place as needed.)