Concept:Maximum EMF is induced when the rate of change of magnetic flux is maximized. This happens when the coil physically cuts through the magnetic field lines optimally.
Solution:- The magnetic field runs North-South. The hoop is initially in an East-West plane, meaning maximum flux is passing through it.
- To create the greatest change in flux (cutting the lines), the hoop must flip out of this alignment. Rotating it around an East-West axis will cause its plane to repeatedly intersect the North-South field lines, inducing maximum EMF.
Why other options are incorrect:Rotating about a North-South axis spins the hoop like a steering wheel relative to the field lines; the flux doesn't change, so zero EMF is induced. Linear motion without rotation in uniform fields does not change the flux linking the area.
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