Two identical circular wires of radius 20 cm and carrying current 
A are placed in perpendicular planes as shown in figure. The net magnetic field at the centre of the circular wires is________x 10 -8 T. (Take 
= 3 14 )
Text Solution
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(628)
The formula to calculate the magnetic field at the center of a current carrying circular loop is given by
…
where, 
is the permeability of free space, i is the current and R is the radius of the loop.
B V , B H are the magnetic field due to the vertical and the horizontal loop, which by magnitude are equal. The resultant magnetic field (B net ) at the center is, then, given by
= 628 x 10 -8 T
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