A current `i` ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor fo the cable, then the magnetic induction at any point outside the conductor at a distance `r` metre from the axis is

A current flows in a conductor from east to west. The direction of the magnetic field at a points above the conductor is

A current I ampere flows along an infinitey1 along straight thin walled tube, then the magnetic induction at any point inside the tube is .

There is a thin conducting wire carrying current. What is the value of magnetic field induction at any point on the conductor itself?

A current i is flowing in a straight conductor of length L. The magnetic induction at a point distant L/4 from its centre will be-

A constant direct current of uniform density hatj is flowing in an infinitely long cylindrical conductor.The conductor contains an infinitely long cylindrical cavity whose axis is parallel to that of the conductor and is a a distance vecl from it.What will be the magnetic induction vecB at a point inside the cavity at a distance vecr from the centre of cavity?

A current of I ampere flows along an infinitely long straight thin walled hollow metallic cylinder of radius r. The magnetic field at any point inside the cylinder at a distance x from the axis of the cylinder is

A current 'I' flows along an infinitely long straight conductor. If 'r' is the perpendicular distance of a point from the lower end of the conductor, then the magnetic induction B is given by

A hollow cylindrical conductor of inner radius a and outer radius b carries a current I uniformly spread over its cross-section. Find the magnetic field induction at a point inside the body of the conductor at a distance r [where a lt r lt b ] from the axis of the cylinder.

A current of 1A is flowing through a straight conductor of length 16cm . The magnetic induction ( in tesla ) at a point 10cm from the either end the wire is :