why does the magnetic field strength increases when we increase the coils around an iron piece in an electromagnet?

Question

ghazi · Answer

due to high permeability of iron it increases strength of magnetic field...

ujjwal · Answer

The strength of magnetic field of a solenoid is directly proportional to the number of turns in solenoid.
And so, as we increase the coils. magnetic field strength increases.

anonymous · Answer

a coil is like a magnetic dipole. increasing number of coil is like increasing number of dipoles and hence increase in magnetic field.