A circular coil with 10 turns of mean radius 10 cm is placed in the magnetic meridian. A current of 0.5 A is passed through the coil. What is the defelctioin of a compass needle placed at the center of the coil? If the coil is rotated, at wht angle will the needle placed to the plane of the coil? If the coil is rotated, at what angle will the needle set parallel to the plane of the coil?)H of earth's field = 30 Am^(-1)`