A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be: 1. nB 2. n2B 3. 2nB 4. 2n2B

 Question:  From NCERT  | NEET   || [Difficult level:Medium] Subtopic:MAGNETIC FIELD ON THE AXIS OF A CIRCULAR CURRENT LOOP || 

:A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be:

1.  nB

2.  n2B

3.  2nB

4.  2n2B

:

......

Show me refernece in NCERT.

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