Two wires, A and B are placed parallel to each other in a vertical plane such that A carries 5 A and B carries 2 A of current in W-E direction. If a magnetic compass is placed mid way between A and B such that it is free to rotate in horizontal plane, then in which direction, would it deflect ? if the direction of current in A and B is reserved, in which direction would it deflect ?

Two wires, A and B are placed parallel to each other in a vertical pla

1.	Two wires, A and B are placed parallel to each other in a vertical plane such that A carries 5 A and B carries 2 A of current in W-E direction. If a magnetic compass is placed mid way between A and B such that it is free to rotate in horizontal plane, then in which direction, would it deflect ? if the direction of current in A and B is reserved, in which direction would it deflect ?
Answer» Solution :(i) RELATIONS between strength of current and magnetic field. (ii) USE Ampere's right hand rule to find the direction of magnetic field. (iii) Usually to determine the magnetic MERIDIAN we use a magnetic compass and the magnetic needle INSIDE it is fixed in a horizontal plane.