A wire loop of the form shown the figure carries a current. Obtain the magnitude and direction of the magnetic field at P.

An electric current I is flowing through an infinitely long conductor bent into the from as shown in the figure. Find the magnitude and direction of magnetic field at the centre of the semi-circular part of the conductor.

A circular loop of radius 9.7 cm carries a current 2.4A. Obtain the magnitude of the magnetic field:- at a distance of 9.7cm from the centre of the loop but on the axis. .

A circular loop of radius 9.7 cm carries a current 2.3A. Obtain the magnitude of the magnetic field:- centre of the loop .

A solenoid of 150 cm length having 300 turns carries a current of 4A. Find the magnitude of the magnetic field inside the solenoid.

A current loop in a magnetic field

A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current1.5 m below the line?

A very long straight wire carries a current 5.2A. What is the magnitude of the magnetic field at a distance 3.1 cm from the wire?

Answer the following questions : Study the following principle and answer the questions. A force is excreted on a current - carrying conductor placed in a magnetic field. The direction of this force depends on both the direction of the current and the direction of the magnetic field . This force is maximum when the direction of the current is perpendicular to the direction of the magnetic field. In which electrical equipment is this principal used?