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प्रश्न
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
उत्तर
parallel to the axis of the tube
The magnetic field lines in the middle of a current-carrying solenoid are parallel to the axis of the tube because magnetic field is uniform inside a solenoid.
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