Question

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) 6.28\times {{10}^{-5}}\,T D) 19.6\times {{10}^{-5}}T

Answer 1

b 3•14\times••••••••