As shown in the figure, a wire and a 10-0 resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm. A uniform but non-steady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is decreased from 0.3 T to 0.1 T in a time interval of 86 ms. The average induced current and its direction through the resistor, in this time interval, are closest to - 20 cm XXX XXX 20 cm XXX b 10 Q 5.6 mA, from a to b 9.3 mA, from a to b 5.6 mA, from b to a 14 mA, from a to b 9.3 mA, from b to a