What is called the positive normal to the plane of the current frame?

A positive normal to the plane of the frame with a current is called a vector, the direction of which coincides with the direction of movement of the tip screwed into the plane of the gimbal frame when its handle is rotated in the direction of the current in this frame.

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.