A wire with total resistance R is formed into a circle. This circle is placed horizontally (in the xy-plane) within the constant magnetic field in the -z direction. The change of the radius of the circle with respect to time is expressed by r=ro(2-0.5t). The circle begins to contract at t = 0. (Assume that the resistance R does not change in this process). For t=1s, find the magnitude and flow direction of the current formed in the circle. (CCW = counterclockwise, CW = clockwise if we are looking from +z towards -2) (n = 3, R= 6 N, B = -2Tk, r, =2 cm ) 0.3 mA, CCW None of them O 0.1 mA, CCW ) 4 V, CW ) 0.6 mA, CW O 0.1 mA CW 0.6 mA, CW 0.3 mA, CW to

A wire with total resistance R is formed into a circle. This circle is placed horizontally (in the xy-plane) within the constant magnetic field in the -z direction. The change of the radius of the circle with respect to time is expressed by r=ro(2-0.5t). The circle begins to contract at t = 0. (Assume that the resistance R does not change in this process). For t=1s, find the magnitude and flow direction of the current formed in the circle. (CCW = counterclockwise, CW = clockwise if we are looking from +z towards -2) (n = 3, R= 6 N, B = -2Tk, r, =2 cm ) 0.3 mA, CCW None of them O 0.1 mA, CCW ) 4 V, CW ) 0.6 mA, CW O 0.1 mA CW 0.6 mA, CW 0.3 mA, CW to