question_answer

A horizontal overhead power line is at a height of 4m from the ground and carries a current of 100 A from east to west. The magnetic field directly below it on the ground is \[({{\mu }_{0}}=4\pi \times {{10}^{-7}}T\,m\,{{A}^{-1}})\]                                                                    [AIEEE 2008]

A) \[5\times {{10}^{-6}}T\] southward

B) \[2.5\times {{10}^{-7}}T\] northward

C) \[2.5\times {{10}^{-7}}T\] southward

D) \[5\times {{10}^{-6}}T\] northward