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General
Easy

Question

The magnetic flux density in vaccum at the centre of any square coil (of one turn) of side 'a' and carrying a current I is kI/a where k is independent. The magnitude of the induction at X, Y, Z are B subscript 1 end subscript, B subscript 2 end subscript and B subscript 3 end subscript respectively. Then

  1. B subscript 3 end subscript greater than B subscript 1 end subscript greater than B subscript 2 end subscript    
  2. B subscript 2 end subscript greater than B subscript 3 end subscript greater than B subscript 1 end subscript    
  3. B subscript 2 end subscript greater than B subscript 1 end subscript greater than B subscript 3 end subscript    
  4. B subscript 1 end subscript greater than B subscript 2 end subscript greater than B subscript 3 end subscript    

The correct answer is: B subscript 3 end subscript greater than B subscript 1 end subscript greater than B subscript 2 end subscript

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