# physics bjhfguklg

kya solenoid magnetic dipole h if no then why do we calculate dipole moment of solenoid

in the lectures sir calculates dipole moment of solenoid

when sir was calculating dipole moment of solenoid that was not joined by ends

sir please explain that can we calculate dipole moment of non magnetic dipole

Yes, it behave like magnetic dipole, circular coil have dipole moment.

Equivalence between magnetic dipole and a solenoid:

For current I through a solenoid with total number of turns N and with cross-sectional area A , the magnetic dipole moment of the solenoid is given by

ms=NIA …………………. (i)

The magnetic dipole moment of a bar magnet of pole strength, m , and length, 2l , is given by

mb=2ml …………………..(ii)

By analogy between solenoid and bar magnet, the pole strength, ms , of the solenoid can be obtained using the above two equations as:

2msl=NIA

ms=NIA/2l=nIA,

where n=N/2l =no. of turns per unit length of solenoid.

Thus Pole-strength of solenoid =(Number of turns per unit length)X(electric current)X(cross-sectional area of solenoid).

NO, we can not calculate dipole moment of non magnetic dipole. because in non magnetic dipole will not exist in the direction of action its a vector form. so, unit vector should be towards each other means towards charge. If magnetic field will not be there this will not take place.