question

(a) state and explain the law used to determine magnetic field at a point due to a current element. derive the expression for the magnetic field due to a circular current carrying loop of radius r at its centre.

(b) a long wire with a small current element of length 1 cm is placed at the origin and carries a current of 10 a along the x-axis. find out the magnitude and direction of the magnetic field due to the element on the y-axis at a distance 0·5 m from it.

 

 

 

 

 

 

574