Question

2) A long vertical wire carries a steady 70 A current. As shown in the figure, a pair of horizontal rails are 0.20 m apart. A 20-2 resistor connects points a and b, at the end of the rails. A bar is in contact with the rails, and is moved by an external force with a constant horizontal velocity of 0.90 m/s to the right, as shown. The bar and the rails have negligible resistance. At the instant that the bar is 0.20 m from the wire, what are the induced current in the resistor and its direction through the resistor? (u0 = 4t x 10-7 T m/A) 2.00 m +0.20 m v 0.90 m/s 70 A 20 0 0.20 m

Answer 1

agne teld due to ar tae positien A very log bor Cie, o 20m auser wire frm vey teng wire)oi oiax1o 70 B= 7x10-5T (® acDSS loour : e 7x1ox0.9x 0.20 e= 1.26x1D-5 inducud cueut in th resstor (i)s e 126x10 6.3x10A a dioechen of fnduced eusrent from a tob