Saved Bookmarks
| 1. |
In the above question find the force required to move the rod with constant vlocity v, and also find the power delivered by the external agent. |
|
Answer» Solution :The force needed to keep the velocity CONSTANT `F_(ext)=ilB=(B^(2)l^(2)v)/(R+r)` Power due to external force `=(B^(2)l^(2)v^(2))/(R+r)=(EPSI^(2))/(R+r)=i^(2)(R+r)` Note that the power DELIVERED by the external agent is joule heating in the CIRCUIT. That means magnetic field helps in converting the mechanical energy into joule heating. |
|