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.

A hexagonal loop of a metallic wire is of each side a and carries a current I . Find the magnitude of magnetic field at the centre of the loop.

In a circle C(O,r), AOB and COD are two diameters perpendicular to each other. Find length of chord AC.

A straight wire carries a current of 3 A.Calculate the magnitude of the magnetic field at a point 15cm away from the wire. Draw a diagram to show tha direction of the magnetic field.

A rectangular loop of metallic wire is of length a and breadth b and carries a current I . Find the magnitude of magnetic field at the centre O of the loop.

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?

Two insulating infinitely long wires are lying mutually perpendicular to each other as shown in the figure. If the two wires carry currenst I_1 and I_2 as shown in the figure, find the magnetic field at point P (A,b).

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)