Question

The following diagram shows two parallel straight conductors carrying
same current. Copy the diagram and draw the pattern of the magnetic
field lines around them showing their directions. What is the magnitude
of magnetic field at a point X' which is equidistant from the conductors ?
Give justification for your answer.
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Answer 1

let me assume that the current is flowing in upward direction as drawn in fig.

Now we know,

i) the current carrying straight conductor forms magnetic field in the form of concentric circles following right hand thumb rule.

The concentric circles of the two wires will overlap at point X. But their direction will be opposite.

so they will cancel out each others effect and the magnitude of the magnetic field at X will be zero Oersted.

Hope this helps mate !!!!

Answer 2

Answer:

The direction of magnetic field in a current carrying wire is given by right hand thumb rule so the pattern of the magnetic field around each wire is given above.

-Direction of magnetic field at A by left wire is out of page (•)

-Direction of magnetic field at A by right wire into the page (X)

as per shown in the image.

since the magnitude of the magnetic field due to each wire is same, hence the net magnetic field at point A is zero