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.

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?

A uniform but time-varying magnetic field B(t) exists with in a circular region of radius a and is directed in to the plane of the paper as shown in the figure. The magnitude of the induced electric field at the point P at a distance r from the centre of the circular region

Two straight long conductors AOB and COD are perpendicular to each other and carry currents I_1 annd I_2 respectively. Find the magnitude of magnetic field at a point P at a distance a from the point O to a direction perpendicular to the plane ABCD.

Two long straight parallel wieres are 2m apart, perpendicular to the plane of the paper. The wire A carries a current of 9.6 A, directed into the plane of the paper. The wire B carries a current such that the magnetic field of induction at the point P, at a distance of 10/11 m from the wire B, is zero. find the magnitude of the magnetic field of induction of the pont S.

A current of 5 A is flowing south to north in a wire kept along north-south direction . Find the magnitude of magnetic field due to a 1 cm piece of the wire at a point 2 m north-east from the piece of wire.

Two long straight parallel wieres are 2m apart, perpendicular to the plane of the paper. The wire A carries a current of 9.6 A, directed into the plane of the paper. The wire B carries a current such that the magnetic field of induction at the point P, at a distance of 10/11 m from the wire B, is zero. find the magnitude and directiion of the current in B.

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)

Calculate the magnetic field due to a circular coil of 250 turns and of diameter 0.1m, carrying a current of 7A at a point on the axis of the coil at a distance 0.12m from the center of the coil.

Two long straight, current-carrying conductors , PQ and XY, are held a constant distance apart as shown in the figure. The conductors carry the magnitude of current in the same direction . A plan view form above the conductors is shown in the figure. Draw arrows, one in each case, to show the direction of the magnetic field at Q due to the current in wire XY. the force at Q as a result of the magnetic field due to the current in wire XY.

A current of 10A is flowing east to west in a long wire kept in the east-west direction. Find magnetic field in a horizontal plane at a distance of 20cm south from the wire