Question

show that a bar magnet magnetic field resembles that of a solenoid​

Answer 1

Prove that a solenoid is equivalent to a bar magnet

Prove that a solenoid is equivalent to a bar magnetBy calculating the axial field of a finite solenoid carrying current, a bar magnet can be demonstrated as a solenoid. ... From the above expression, it is understood that the magnetic moment of a bar magnet is equal to the magnetic moment of a solenoid.

Answer 2

Answer:

By applying Fleming's Right Hand in each turn, we get magnetic field .

But Magnetic field lines never intersect. They interact with the fieds of the surrounding turns of solenoid to form a combined magnetic field which looks like this:-

The magnetic field circling each loop of wire combines with the fields from the other loops to produce a concentrated field down the centre of the coil. A loosely wound coil is illustrated to show the interaction of the magnetic field. The magnetic field is essentially uniform down the length of the coil when it is wound tighter.

If the loops or turns are extremely close to each other, magnetic field lines between neighbouring turns effectively cancel, resulting in straight magnetic fields inside the solenoid, similar magnetic fields inside a bar magnet

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