...upwards : in the first case the points of the posterior hemisphere descend, in the second they ascend. "When the axis of rotation is parallel to the direction of the motion of translation, the motion is not important to be considered for the present, it will be described...

...a coil of wire is rotated in the field using a suitable commutator the resulting EMF only vanishes when the axis of rotation is parallel to the direction of the magnetic field. [4.] Dip Needle. — A magnetic needle, suspended at its centre of gravity and moving in a vertical...