Note:
From Question number's 21 to 30 rules for Answer marking.
If the Questions have options then you have to answer as follows 
If your answer is option 3 Then fill the OMR sheet as ‘3’
If your answer is options 2&4, Then fill the OMR sheet as ‘24’
if you answer is options 1,3&4 then fill the OMR sheet as ‘134’
And if you answer is options 1,2,3&4 then fill the OMR sheet as ‘1234’
If the question is numerical based, then fill the OMR sheet as usual.
 

 

Two infinitely long conductors carrying equal currents are shaped as shown in figure. All the short sections are shaped as shown in figure and all the short sections are of equal lengths. The point P is located symmetrically with respect to the conductors. The magnetic field at P due one conductor is B. If the total field at P is  $xB$ then find $x$