How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with a help of bar magnet? Explain.
When a current is passed through the solenoid, the current in each circular loop has the same direction, their magnetic effects get added up producing a strong magnetic field. Inside the solenoid, the magnetic field is almost uniform and parallel to the axis of the solenoid.
Fig. Magnetic field of a straight solenoid
Fig. Magnetic field of a bar magnet
We bring the N-pole of the bar magnet near one end of the solenoid: If there is an attraction, then that end of the solenoid has south polarity and the other has north polarity. If there is a repulsion, then that end of the solenoid has north polarity and the other end has south polarity.
969 Views
