Identify the correct statement.

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(B) According to Oersted's experiment and the Biot-Savart law,a straight current-carrying conductor produces a magnetic field. The magnetic field line

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$A$ straight current-carrying conductor has circular magnetic field lines around it.

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(B) According to Oersted's experiment and the Biot-Savart law,a straight current-carrying conductor produces a magnetic field. The magnetic field lines around a long straight current-carrying wire are concentric circles with the wire as the center. Therefore,option $B$ is correct. Fleming's Left-Hand Rule is used to determine the direction of force on a current-carrying conductor in a magnetic field,not the field itself. The magnetic field inside an ideal solenoid is uniform.

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