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  • A current of 10A is flowing from east to west in a long straight wire kept on a horizontal table. The magnetic field developed at a distance of 10 cm due north on the table is :    Option: 1 <img alt="2 \times 10^{-5}

A current of 10A is flowing from east to west in a long straight wire kept on a horizontal table. The magnetic field developed at a distance of 10 cm due north on the table is :   
Option: 1 2 \times 10^{-5} T, acting downwards 
Option: 2 2 \times 10^{-5} T, acting upwards 
Option: 3 4 \times 10^{-5} T, acting downwards
Option: 4 4 \times 10^{-5} T. acting upwards

Answers (1)

\\B=\frac{\mu_0I}{2\pi r}\ downwards\\\\=\frac{4\pi\times10^{-7}\times10}{2\pi\times10\times10^{-2}}=2\times10^{-5}\ downwards

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Safeer PP

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