Saved Bookmarks
| 1. |
As shown in Fig. 6.26, a rectangular loop and a circular loop are moving out of a uniform magnetic field region to a field free region with a constant velocity v. In which loop do you expect the induced emf to be constant during the passage out of the field region ? The field is normal to the loops. |
| Answer» Solution :The induced emí is expected to be constant in case of RECTANGULAR LOOP only. Induced emf depends upon RATE of CHANGE of magnetic flux, which in present case is proportional to change in area of the loop. For a rectangular loop the rate of change in area is constant, hence induced emf is expected to be constant. However, for a circular loop, the rate of change of area of the loop during its passage out of the field region is not constant. Hence, induced emf will also VARY accordingly. | |