A vertical matallic pole falls down through the plane of magnetic meridian. Will any e.m.f. be induced between its ends ?

A vertically metallic pole falls down through the plane of magnetic meridian. Will any emf be induced between its two ends?

A uniform circular metal disc of radius R is rotating about a vertical axis passing through its centre and perpendicular to its plane with constant frequency f. If B_(H) and B_(V) are horizontal and vertical components of the Earth's magnetic field respectively, then the induced e.m.f between its centre and the rim is

a semicircle wire of radius R is rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of wire. There is a uniform magnetic field of strength B . The induced emf between the ends is