A cylindrical solenoid 40cm long with a radius of 5 mm has 300 tightly wound turns uniformly distributed along its length. Around the middle of the solenoid is a two-turn rectangular loop 3 cm by 2 cm made of resistive wire having a resistance of 150 ohms. One microsecond after connecting the loose wire to the battery to form a series circuit with the battery and a 20-ohm resistor, what is the magnitude of the current in the rectangular loop and its direction (clockwise or counterclockwise in the diagram) ?