A horizontal circular wire loop of radius 0.2 m lies in a plane perpendicular to a uniform magnetic field pointing from above into the plane of the loop, has a magnitude of 0.45 T.
If in 0.04 s the wire is reshaped from a circle into a square, but remains in the same plane,what is the magnitude of the average induced emf in the wire during this time?
Answer in units of V.
The current in the loop during the deforma- tion
1. flows clockwise when viewed from above.
2. flows counter-clockwise when viewed from above.
3. does not arise.
4. flows in a direction that cannot be determined from given information.