Two thick wires  and two thin wires, all of the same materais  and same  length  from a
Channel: Doubtnut
Date: 02/08/2020

Two thick wires  and two thin wires, all of the same materais  and same  length  from a square in the three differenct ways, `P,Q` and `R`  as shwon in figure  with current  connection  shown, the magneitc feidl at the centre of the square is zero in cases.   img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/BMS_OBJ_XII_C04_E01_412_Q01.png" width="80%"