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| 1. |
A ring rotates with angular velocity `omega` about an axis perpendicula to the plane of the ring passing through the center of the ring (Fig. 3.77). A constant magnetic field `B` exists parallel to the axis. Find the emf induced in the ring. |
| Answer» Flux passing through the ring `phi=B.A` is a constant here, therefore emf induced in the coil is zero. Every point of this ring at the same potential, by symmetry. | |