A straight insulated wire is laid on the floor under the linoleum. How to locate a wire and direct current

A straight insulated wire is laid on the floor under the linoleum. How to locate a wire and direct current direction in it without opening linoleum?

To locate the wire and the direction of the current in it. it is necessary to place a magnetic arrow above the floor and find the direction of the current in the wire according to the established position of the arrow.

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