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A circular loop of radius 20cm is placed in a uniform magnetic field stack B with rightwards arrow on top equals 2 T text  in  end text X minus Yplane the loop carries a current 1A in the direction shown in figure The magnitude of torque acting on the loop is nearly

  1. 0.25 N-m    
  2. fraction numerator 0.25 over denominator square root of 2 end fraction N minus m    
  3. 0.75N-m    
  4. fraction numerator 0.75 over denominator square root of 2 end fraction N minus m    

The correct answer is: 0.25 N-m

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