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A condenser has two conducting plates of radius 10cm separated by a distance of 5mm. It is charged with a constant current of 0.15A. The magnetic field at a point 2cm from the axis in the gap is

  1. 1.5 cross times 10 to the power of negative 6 end exponent T    
  2. 3 cross times 10 to the power of negative 8 end exponent T    
  3. 6 cross times 10 to the power of negative 8 end exponent T    
  4. 3 cross times 10 to the power of negative 6 end exponent T    

The correct answer is: 6 cross times 10 to the power of negative 8 end exponent T

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