9 A long straight wire carrying a current of 200 A runs

Last updated: 6/13/2023

9 A long straight wire carrying a current of 200 A runs through a cubical box entering and leaving through holes in the centres of opposite faces as shown in Pig 4 19 Each side of the box is of 20 cm A D PQC Fig 4 19 Consider an element PQ of the wire 1 cm long at the centre of the box Calculate the magnetic field produced by this element at the points A B C and D The points A B and C are the centres of the faces of the cube and D is the midpoint of one edge Ans 20 x 10 6 T 20x10 6