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The magnetic field lines in the middle of the current-carrying solenoid are?(a) circles (b) spirals(c) parallel to the axis of the tube (d) perpendicular to the axis of the tube
(c) parallel to the axis of the tube
Explanation
The magnetic field lines in the middle of a current-carrying solenoid are parallel to the axis of the tube because the magnetic field is uniform inside a solenoid.
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