Question 1:

Two perpendicular straight wires join in the ends ota semicircular loop of radius a. = 15 cm as shown in the figure above. If the current I 3A.. what is the resultant field at the center of the circular section? [:]T out of the page. b A current loop consists of two concentric semicircles joined by radial sections, as shown in the figure above. I = 7 A, a =5 cm, b = 80 cm. What is the field strength at the center of the semicircles? T into the page