Q. No 8: How does a solenoid behave like a magnet? Can you
determine the north and south poles of a current-carrying solenoid with the
help of a bar magnet? Explain.
Ans:
Solenoid is coil having n number of turns of insulated copper
wire. Magnetic field lines are produced around the solenoid when a current is passed
through it. The magnetic field produced by it is similar to the magnetic field
of a bar magnet. The field lines produced in a current-carrying solenoid is
shown in the following figure.
When the north pole of a bar magnet is brought near to the end
connected to the negative terminal of the battery, then the solenoid repels the
bar magnet. It means the end of solenoid which is connected to the negative
terminal of the battery behaves as north pole as like poles repel each other similarly
the other and behaves as a south pole.
