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A horizontal overhead power line carries a current of $90A$ in east to west direction . What is the direction of the magnetic field due to current $1.5 m$ below the line .

$\begin{array}{1 1} \text{Perpendicular , outwards to the plane of paper} \\ \text{Perpendicular inwards to the plane of paper} \\ \text{parallel along the surface to the right of the plane of the paper } \\ \text{along the surface of the paper to the left side }\end{array} $

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A)
Solution :
The direction of magnetic field can be determined by using maxwells right hand rule .
The direction of a magnetic field due to the following current is perpendicular outwards to the plane of the paper.
Answer : $\text{Perpendicular , outwards to the plane of paper}$
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