1.

A straight wire carrying a current 10 A is bent into a semicircular arc of radius 5 cm. The magnitude of magnetic field at the center is   [CPMT 2000]

A.  \[1.5\times {{10}^{-5}}\,T\]   
B.  \[3.14\times {{10}^{-5}}\,T\]
C. If assertion is true but reason is false.
D.  \[19.6\times {{10}^{-5}}T\]
Answer» D.  \[19.6\times {{10}^{-5}}T\]


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