The diagram shows a square coil with its plane parallel to a uniform magnetic field.
The coil always remains within the magnetic field.
There are four possible changes to the position of the coil:
- moving it to the left
- moving it towards Y
- rotating it about the axis YYˊ
- rotating it about an axis Z that is at its centre and perpendicular to the plane of the coil.
How many of these changes will result in an induced emf in the coil while the change occurs?
one
2 )
two
3 )
three
4 )
four
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