A conductor carrying current is placed somewhere. What is the magntiude and direction of the field due to a small part of the conductor at a point near it?

What is the nature of magnitude lines of force due to current in a straight conductor?

A current 'I' flows in a conductor placed perpendicular to the plane of paper. Indicate the direction of the magnetic field due to a small element d vecl at a point P situated at a distance vecr from the element as shown in the figure HQ 1.

Two long straight parallel conductors 'a' and 'b', carrying steady currents Ia and Ib are separated by a distance d. Write the magnitude and direction of the magnetic field produced by the conductor 'a' at the points along the conductor 'b'.If the currents are flowing in the same direction, what is the nature and magnitude of the force between the two conductors ? F_(BA) = (mu_0I_A I_B L)/(2pid)

In the alongside figure a straight conductor B is carrying current in the vertical downward direction. What will be the direction of magnetic field lines around the conductor?

WHat is the direction of force between two parallel conductors carrying current in opposite direction?

WHat is the direction of force between two parallel conductors carrying current in same direction