filmov
tv
Figure shows a square loop ABCD with edge length a. The resistance of the wire ABC is r and that of
![preview_player](https://i.ytimg.com/vi/6tW1PouZGPY/maxresdefault.jpg)
Показать описание
Figure shows a square loop ABCD with edge length a. The resistance of the wire ABC is r and that of ADC is 2r. Find the magnetic field B at the centre of the loop assuming uniform wires. `