a person holds a small compass near a long, straight wire that is carrying a cur

Question

a person holds a small compass near a long, straight wire that is carrying a current, but detects no deflection no deflection of the compass needle and therefore concludes that there is no magnetic field near the wire. Which of the following statement is most likely the assumption made by the person to arrive at this conclusion? the wire is carrying a current any magnetic field due to a current in a wire is much greater than the earth's magnetic field. The site is at least several meters long There is no deflection of the compass needle near the wire Current has been flowing through the wire for an extended period of time Please explain why & why not on each parts Thank you

Explanation / Answer

Any magnetic field due to a current in wire is much greater than the earth's magnetic field.

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