A current element is at the origin of the coordinate system. The x- and the y-axis are horizontal, and the z-axis is vertical. The element is 1.25 cm long and it carries an electric current of 16.7 A. The current element points vertically up. What is the magnitude of the current element? (a) Consider field-point P = (5.40,-5.57,3.37), where the coordinates of the field-point are measured in meters. How far is the field-point from the origin? (b) What is the angle between the z-axis and the vector pointing from the origin to point P? (c) What is the magnitude of the B-field at point P produced by the current element at the origin?

A current element is at the origin of the coordinate system. The x- and the y-axis are horizontal, and the z-axis is vertical. The element is 1.25 cm long and it carries an electric current of 16.7 A. The current element points vertically up. What is the magnitude of the current element? (a) Consider field-point P = (5.40,-5.57,3.37), where the coordinates of the field-point are measured in meters. How far is the field-point from the origin? (b) What is the angle between the z-axis and the vector pointing from the origin to point P? (c) What is the magnitude of the B-field at point P produced by the current element at the origin?