A wire length 24 cm is bent into a squsre and placed flat on a table. A current of 45 mA is passed through the wire in a counterclockwise direction from looking above. What is the magnitude and direction of the resulting magnetic field at the center of the square.
Two sqaures of wire like that of above are placed side by side on a table with a distance of 8 cm between the closest sides of the two sqaures. A 45 mA current passes counterclockwise through both squares. What is the resulting force between the two squares? Is it repulsive or attractive?