question

(a) derive the expression for the magnetic field due to a current carrying coil of radius r at a distance x from the centre along the x-axis.

(b) a straight wire carrying a current of 5 a is bent into a semicircular arc of radius 2 cm as shown in the figure. find the magnitude and direction of the magnetic field at the centre of the arc.

 

 

 

 

 

 

 

 

1053