The conductor is placed in the direction of the magnetic meridian, i.e. in the direction of the magnetic arrows (from north to south). In order for the deflection of the arrow to be as clear as possible. In this case, the compass needle will deflect 90 degrees. In addition, to avoid the smallest deviations due to the poles of the earth. This arrangement will make the experiment accurate.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.