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General
Easy

Question

Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having its centre at the origin of co-ordinate system. If current I is flowing thriugh each ring then the magnitude of the magnetic field at the common centre is

  1. square root of 3 fraction numerator mu subscript 0 end subscript I over denominator 2 R end fraction    
  2. zero    
  3. left parenthesis square root of 2 minus 1 right parenthesis fraction numerator mu subscript 0 end subscript I over denominator 2 R end fraction    
  4. left parenthesis square root of 3 minus square root of 2 right parenthesis fraction numerator mu subscript 0 end subscript I over denominator 2 R end fraction    

The correct answer is: square root of 3 fraction numerator mu subscript 0 end subscript I over denominator 2 R end fraction

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