1.

Magnetic field intensity at the centre of coil of 50 turns, radius 0.5 m and carrying a current of 2 A is [CBSE PMT 1999; BHU 2002]

A.    \[0.5\times {{10}^{-5}}\,T\]      
B.    \[1.25\times {{10}^{-4}}\,T\]
C.    \[3\times {{10}^{-5}}\,T\]          
D.    \[4\times {{10}^{-5}}\,T\]
Answer» C.    \[3\times {{10}^{-5}}\,T\]          


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