Question

Can u please answer 15th question?.

Answer 1

The diagram is in the attachment.

The magnetic effetc decrease with the increase in distance from the wire. This can be seen in diagram. One property of magnetic field lines state that  the magnetic strength os more where the magnetic field lines are more crowed. So we can see that the magnetic field lines are less crowed away from the wire as compared to the field lines close to the wire. That is the proof for the statement.

Hope this answer will help you.

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